A sex or legal sex is assigned to a person on the basis of primary / external sex characteristics (genitalia) and reproductive functions when they are born. A person’s legal sex may be changed as part of gender reassignment.

Sometimes the terms ‘sex’ and ‘gender’ are used interchangeably to mean ‘male’ or ‘female’,116 however it is important to make a distinction between ‘legal sex’ and ‘gender identity’ wherever possible and particularly when it comes to equality monitoring questions. Unless communications are referring specifically to an individual’s legal sex, it is considered to be more inclusive to use the word ‘gender’ rather than ‘sex’ as this takes account of gender identity.  

For more information, please see the full 'Sex' and ‘Gender or Gender identity’ definitions below.


116 Stonewall Glossary of Terms

Content warning

Some of the terminology and definitions used in this glossary relate to subject matter that may be upsetting or triggering for some people.