gen·der 
(jĕndər)
(jĕndər)n.
1. Grammar
a. A grammatical category, often designated as male, female, or neuter, used in the classification of nouns, pronouns, adjectives, and, in some languages, verbs that may be arbitrary or based on characteristics such as sex or animacy and that determines agreement with or selection of modifiers, referents, or grammatical forms.
b. The fact of being classified as belonging to such a category: agreement in gender, number, and case.
2.
a. Either of the two divisions, designated female and male, by which most organisms are classified on the basis of their reproductive organs and functions; sex.
b. One's identity as female or male or as neither entirely female nor entirely male.
c. Females or males considered as a group: Students lined up with the genders in different lines.
tr.v. gen·dered, gen·der·ing, gen·ders
Archaic
Archaic
To engender.
[Middle English gendre, from Old French, kind, gender, from Latin genus, gener-; see genə- in the Appendix of Indo-European roots.]
gender·less adj.
Usage Note: Some people maintain that the word sex should be reserved for reference to the biological aspects of being male or female or to sexual activity, and that the word gender should be used only to refer to sociocultural roles. Accordingly, one would say The effectiveness of the treatment appears to depend on the sex of the patient and In society, gender roles are clearly defined. In some situations this distinction avoids ambiguity, as in gender research, which is clear in a way that sex research is not. The distinction can be problematic, however. Linguistically, there isn't any real difference between gender bias and sex bias, and it may seem contrived to insist that sex is incorrect in this instance.