IT Definition

1. computing.
The use, study or production of a range of technologies (especially computer systems, digital electronics and telecommunications) to store, process and transmit information.

1. Information technology.

1. The thing, animal, small baby or group already mentioned.
2. The person in question

Example: Who is it?
3. Used as the subject with impersonal verbs and when describing the weather or distance or telling the time.

Example: It's a bit blustery today
4. Used as the grammatical subject of a sentence when the real subject comes later, eg It's not a very good idea running away (which means Running away is not a very good idea).
5. Used to refer to a general situation or state of affairs

Example: How's it going?
6. Used to emphasize a certain word or phrase in a sentence

Example: When is it that her train is due to arrive?
7. Exactly what is needed, suitable or available

Example: That's it!
8. Used with many verbs and prepositions as an object with little meaning.

Example: run for it

1. The person in a children's game who has to oppose all the others, eg by trying to catch them. See also tag²
2. old use, colloq
Sex appeal.
3. colloq
Sexual intercourse.