IT

pron. (poss. its; pl. they) 1 the thing (or occas. the animal or child) previously named or in question (took a stone and threw it). 2 the person in question (Who is it? It is I; is it a boy or a girl?). 3 as the subject of an impersonal verb (it is raining; it is winter; it is Tuesday; it is two miles to Bath). 4 as a substitute for a deferred subject or object (it is intolerable, this delay; it is silly to talk like that; I take it that you agree). 5 as a substitute for a vague object (brazen it out; run for it!). 6 as the antecedent to a relative word (it was an owl I heard). 7 exactly what is needed (absolutely it). 8 the extreme limit of achievement. 9 colloq. sexual intercourse; sex appeal. 10 (in children's games) a player who has to perform a required feat, esp. to catch the others. øthat's it colloq. that is: 1 what is required. 2 the difficulty. 3 the end, enough. this is it colloq. 1 the expected event is at hand. 2 this is the difficulty. [OE hit neut. of HE]