Sex

[Biff]

Gender refers to language and is often mis-used to refer to the sex of an individual. Some dictionaries have relented and begun to define gender improperly as sex.

You're saying the dictionary definition is wrong ?

It depends on what dictionary you are reading. As I said, some dictionaries have relented.

From dictionary.com:

Traditionally, gender has been used primarily to refer to the grammatical categories of "masculine," "feminine," and "neuter," but in recent years the word has become well established in its use to refer to sex-based categories, as in phrases such as gender gap and the politics of gender. This usage is supported by the practice of many anthropologists, who reserve sex for reference to biological categories, while using gender to refer to social or cultural categories. According to this rule, one would say The effectiveness of the medication appears to depend on the sex (not gender) of the patient, but In peasant societies, gender (not sex) roles are likely to be more clearly defined. This distinction is useful in principle, but it is by no means widely observed, and considerable variation in usage occurs at all levels.