Gender expression refers to the way in which a person manifests his or her gender through appearance and behavior, such as style of dress, make-up, body language and other visible elements. These signals enable others to perceive and socially identify the gender to which a person appears to belong, although this expression can vary independently of gender identity or the gender assigned at birth. It is a set of visual and behavioral codes, often influenced by cultural norms, that make gender perceptible in society.

Source: