Hair Definitions
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Hair Definitions
We are a Hair Extensions London Specialist. We also specialise in Kerastraight keratin treatments and cosmetic hair loss treatment for women. Clients from all over the UK and far-flung locations such as Dubai, Nigeria and Italy to have their hair transformed by a hair extensions London specialist salon.

At Hair Definitions, we exist to make you feel good about your hair. We aim to take good care of your natural hair and enhance your look by recommending solutions which are best for your hair. Let us help you on your journey towards beautiful, healthy hair.
Services
AURA is formulated with a premium complex of hyaluronic acid produced by fermentation. It is obtained through a high-performance biotechnological method that is safe and respectful of the environment. Applying this premium hyaluronic acid to hair offers intense hydration and protection. It increases shine and creates an anti-pollution barrier effect.
At our salon, you will be taken through a FREE detailed consultation so that we can check that micro rings hair extensions is the most suitable solution to give you the length and volume you are after. We have the interest of your natural hair at heart, if your hair is not suitable for micro rings hair extensions we will NOT suggest it and will let you know what the alternatives are.
We understand what a difficult time this can be. We pride ourselves on our sensitive approach to this upsetting issue and have worked tirelessly to produce fantastic cosmetic hair loss treatment solutions. If you are suffering from thinning hair, bald patches or some other form of hair loss, we can offer several cosmetic hair loss treatments including hair systems (wigs), partials/volumisers and custom-made systems (wigs).
What are Brazilian Knots Hair Extensions? We bring you the latest trend from Brazil - Brazilian Knots. This method is kind to the hair. It is one of the safest hair extensions method as no glue, tape or heat is used. Brazilian knot is the longest lasting but safe hair extensions method that we know of.
KeraStraight treatment is a semi-permanent treatment that has been designed to transform even the most difficult hair into stronger, straighter, repaired hair that's easy to maintain and gorgeous to the touch. KeraStraight uses a unique combination of low pH proteins that will renew dry, damaged and weak hair, transforming it completely into healthy, straighter and stronger hair that both looks and feels amazing.
Reviews (15)
A. Duck With An Umbrella
A. Duck With An Umbrella
Jan 06, 2022
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I had a keratin treatment with Marietta and am so happy with the results. My hair was sleek shiny and soft after each wash. Definitely going back for my boost treatment.
Jess Messense
Jess Messense
Dec 26, 2021
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First time going to Hair definitions and will definitely continue to visit. Marietta is a gem in person and with hair. When a person does something and makes it look effortless.She understands different hair types and met my hair needs. She is very fair and good with pricing, unlike other hairdressing places that add extras to price. Thank you hair definitions.
Julia Osa
Julia Osa
Nov 30, 2021
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Got the keratin treatment done. She was patient enough to answer all my questions and suggest treatments suitable for my hair texture.
Treatment left my hair feeling smooth, silky and ultra manageable.
Will definitely recommend.
Marietta can handle 4c hair. She recommended the aura treatment if I wasn’t satisfied with the keratin results
Yolanda William
Yolanda William
Sep 11, 2021
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Positive: Cleanliness, Professionalism, Punctuality, Quality
It has taken my years to find a salon that is professional and good quality. I am extremely happy with their service, and will definitely be coming again. Highly recommended.
Services: Braids, Hair extensions
Louisa Edwards
Louisa Edwards
Jul 12, 2021
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The BEST hair salon ever. I literally won't go anywhere else. I have been going here for over 2 years now and they have revived my hair, it has never been healthier. They all give great advice on how to care for my hair and help me to make it look it's best. I have been getting the kerastraight treatment for a year and a half which has resulted in my hair being the longest and healthiest it has been in a long time and their brazilian knots service makes my hair look incredible. They give honest advice and don't make you try buy anything you don't need and always steer me in the right direction
Grace W.
Grace W.
Dec 21, 2019
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I trust a very few people when it comes to my hair. I have been getting my hair done by Marietta at Hair Definitions for a few years now. She is very knowledgeable about hair, provides great customer services and great results. I always happy with the outcome. My hair always looks fantastic and the health of hair has improved dramatically since using her. Everywhere I go I get asked about my hair by almost everyone I meet. I will highly recommend Marietta and Hair Definitions!!!☺️😍👌🏾
Almaz Tekleab
Almaz Tekleab
Nov 16, 2019
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My first experience at Hair Definitions and I'll certainly be back! I was greeted with such warmth by Mary, who immediately made me feel very welcome. Marietta understand what I wanted instantly and was so friendly, easy to talk to and responsive. Very impressed to find a hairdressers that provides both a luxurious and stylish experience and with such friendly service. I love the atmosphere 😍😍highly recommend :)
Elsa Tsegayae
Elsa Tsegayae
Sep 23, 2019
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Brilliant service and styling. I have been going here for a year now and always leave the salon with great looking hair. the staffs are super friendly professional and also great value for the equality of the products. highly recommended
Gertrud Gjedsig Hofler
Gertrud Gjedsig Hofler
Sep 17, 2019
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!!! FAKE HAIR AND PEOPLE !!! 1 Star Please do yourself a favour and check the pictures I attached. The first is how my hair looked when leaving the salon (I ordered curly hair) the second picture is my hair… after ONE wash, no curls anymore!!! As for the first, the hair is already applied extremely unprofessional, and for the last picture the hair has gone straight. I did not get a refund for the hair but I got one for the service, which is extremely bad costumer service as the hair was the problem. DO NOT GO HERE.
Adelana Carty
Adelana Carty
Nov 04, 2017
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I got the Kerastraight done. Best thing I ever did! And the salon is amazing. The nicest place I have ever been. Check it out for your self.
Basher Jaber-Dingjan
Basher Jaber-Dingjan
Sep 20, 2017
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I LOVE my new hair! Marietta did a great job and the time went so quick. Thank you so much and I will be back for sure!! :)
Yassine Watson-Bedaisi
Yassine Watson-Bedaisi
Aug 26, 2017
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Ruby gave me a Haircut and kerastraight treatment. Best haircut I've had. I made a few risky requests which could have gone very wrong in the wrong hands but she pulled it off exactly how I hoped.
Maddie Blackley
Maddie Blackley
Jun 30, 2017
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Went and had hair extensions done by the lovely Marietta. She is amazing. My hair looks incredible. The salon and other staff are lovely and made me feel really welcome. Thank you so much xx
Elena Sanchez
Elena Sanchez
Apr 30, 2017
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I wanted to try the Brazilian knots for a long time. I did my research and got a shortlist of hair salons to visit. As soon as I entered HD I felt these people knew what they were talking about plus they were super friendly.
Marieta was able to answer all my questions and she did and amazing job at managing expectations. She also offered me the… best quality hair I've ever seen, which took some time to arrive to London but she diligently kept me up to date with the order.
I got the Brazilian knots done today and I'm beyond happy with them. Again, Marieta was super professional, informative
Lucy Gee
Lucy Gee
Apr 15, 2017
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Marietta did my hair extensions (Brazilian knots) and I have never been so happy with my hair! She is lovely and very talented and I would recommend this place to any girl looking for reasonably priced hair extensions which will look beautiful after!