used to refer to a thing previously mentioned or easily identified

a room with two beds in it

this approach is refreshing because it breaks down barriers

used to identify a person

it's me

it's a boy!

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

it's half past five

it was two miles to the island

it's raining

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

it is impossible to assess the problem

she found it interesting to learn about their strategy

used to emphasize a following part of a sentence

it is the child who is the victim

the situation or circumstances; things in general

no one can stay here—it's too dangerous now

he would like to see you straight away if it's convenient

exactly what is needed or desired

they thought they were it

you've either got it or you haven't

sex appeal

he's still got ‘it.’

denoting a person or thing that is exceptionally fashionable, popular, or successful at a particular time

they were Hollywood's It couple

the company is renting out the It bags of the moment for as little as £10 a week

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

Italian vermouth

he poured a gin and it

the development and use of IT are certain to bring about changes in education

basic IT skills