iden·ti·ty Pronunciation: (-dnt-t) n. pl. i·den·ti·ties 1 : sameness of essential or generic character in different instances b : sameness in all that constitutes the objective reality of a thing : ONENESS 2 : the distinguishing character or personality of an individual : INDIVIDUALITY b : the relation established by psychological identification 3 : an equation that is satisfied for all values of the symbols 5 : IDENTITY ELEMENTx Pronunciation: 'eks 1 : the 24th letter of the English alphabet b : a graphic representation of this letter c : a speech counterpart of orthographic x 2 : a graphic device for reproducing the letter x 3 : one designated x especially as the 24th in order or class, or the first in an order or class that includes x, y, and sometimes z 4 : an unknown quantity