It

• POS: Noun, Pronoun

CIDE DICTIONARY

It, pron. [OE. it, hit, AS. hit; cf. D. het. He.].

•  The neuter pronoun of the third person, corresponding to the masculine pronoun he and the feminine she, and having the same plural (they, their or theirs, them).  [1913 Webster]

  " The possessive form its is modern, being rarely found in the writings of Shakespeare and Milton, and not at all in the original King James's version of the Bible. During the transition from the regular his to the anomalous its, it was to some extent employed in the possessive without the case ending. See His, and He. In Dryden's time its had become quite established as the regular form."  [1913 Webster]

  " In the course of time, the nature of the neuter sign t in it, the form being found in but a few words, became misunderstood. Instead of being looked upon as an affix, it passed for part of the original word. Hence was formed from it the anomalous genitive its, superseding the Saxon his."  Latham.  [1913 Webster]

  "The day present hath ever inough to do with it owne grief."  [1913 Webster]

  "Do, child, go to it grandam, child."  [1913 Webster]

  "It knighthood shall do worse. It shall fright all it friends with borrowing letters."  [1913 Webster]

  "The fruit tree yielding fruit after his (its) kind."
•  As a substance for any noun of the neuter gender; as, here is the book, take it home.  [1913 Webster]

  "It is I; be not afraid."  [1913 Webster]

  "Peter heard that it was the Lord."
•  As a demonstrative, especially at the beginning of a sentence, pointing to that which is about to be stated, named, or mentioned, or referring to that which apparent or well known; as, I saw it was John.  [1913 Webster]
•  As an indefinite nominative for a impersonal verb; as, it snows; it rains.  [1913 Webster]

  "Think on me when it shall be well with thee."  [1913 Webster]
•  As a substitute for such general terms as, the state of affairs, the condition of things, and the like; as, how is it with the sick man?  [1913 Webster]

  "The Lacedemonians, at the Straits of Thermopylæ, when their arms failed them, fought it out with nails and teeth."  [1913 Webster]

  "Whether the charmer sinner it, or saint it,
  If folly grows romantic, I must paint it."  [1913 Webster]
•  As an indefinite object after some intransitive verbs, or after a substantive used humorously as a verb; as, to foot it (i. e., to walk).  [1913 Webster]

Its self. See Itself.

OXFORD DICTIONARY

It, abbr. information technology.

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.

Idiom

that'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.

It, n. colloq. Italian vermouth (gin and it).

Etymology

abbr.

THESAURUS

It

I, I myself, alter, alter ego, alterum, better self, ego, ethical self, he, her, herself, him, himself, inner man, inner self, me, my humble self, myself, not an illusion, number one, oneself, other self, ourselves, self, she, subconscious self, subliminal self, superego, the article, the genuine article, the goods, the very model, the very thing, them, themselves, they, you, yours truly, yourself, yourselves