it

it¹

pronoun [third person singular]

1》 used to refer to a thing previously mentioned or easily identified.

    ↘referring to an animal or child of unspecified sex.

2》 used to identify a person.

3》 used in the normal subject position in statements about time, distance, or weather.

4》 used in the normal subject or object position when a more specific subject or object is given later in the sentence.

5》 used to emphasize a following part of a sentence.

6》 the situation or circumstances.

7》 exactly what is needed or desired.

8》 informal sexual intercourse or sex appeal.

9》 (in children's games) the player who has to catch the others.

Phrases

that's it

1》 that is the main point or difficulty.

2》 that is enough.

this is it the expected event is about to happen.

Origin

OE hit, neut. of he, of Gmc origin.

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it²

noun Brit. informal, dated Italian vermouth.