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its

[ its ]
/ ɪts /
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pronoun

the possessive form of it1 (used as an attributive adjective): The book has lost its jacket. I'm sorry about its being so late.

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The rainy weather could not ________ my elated spirits on my graduation day.

Origin of its

1590–1600; earlier it's, equivalent to it1 + 's2
A very common mistake is to write its (the possessive form of it ) when it's (the short form of it is or it has ) is required: It's [it is] unclear what he meant. It's [it has] been wonderful seeing you again. But do not use it's for it has when has is the main verb: It has a strong flavor; use it sparingly cannot be written as It's a strong flavor… An equally common mistake is to use it's for the possessive, probably because ordinary possessives of nouns are formed with an apostrophe: the dog's coat; Mary's cell phone. But the possessive its is a pronoun, not a noun, and, like other possessive pronouns ( his, hers, yours, and theirs ), is written without that particular bit of punctuation: I have to fix my bike. Its front wheel came off.
While it is possible to use its as a predicate adjective ( The cat is angry because the bowl you're eating out of is its! ) or as a pronoun meaning “that or those belonging to it” ( Your notebook pages are torn. Borrow my notebook—its aren't ), such use is rare and in most circumstances strained. See also me.
it's, its (see confusables note at the current entry)

Definition for its (2 of 2)

it's
[ its ]
/ ɪts /

contraction of it is:It's starting to rain.
contraction of it has: It's been a long time.
See its.
it's , its (see confusables note at its)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for its (1 of 2)

its
/ (ɪts) /

determiner

  1. of, belonging to, or associated in some way with itits left rear wheel
  2. (as pronoun)each town claims its is the best

British Dictionary definitions for its (2 of 2)

it's
/ (ɪts) /

contraction of

it is or it has
One of the commonest mistakes made in written English is the confusion of its and it's . You can see examples of this every day in books, magazines, and newspapers: its good for us; a smart case with it's own mirror, and even Cheng, and its' subsidiaries . Its refers to something belonging to or relating to a thing that has already been mentioned: the baby threw its rattle out of the pram . It's is a shortened way of saying it is or it has (the apostrophe indicates that a letter has been omitted: it's a lovely day; it's been a great weekend .
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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