itsPronunciation: (its), [key]
the possessive form of it
(used as an attributive adjective): The book has lost its jacket. I'm sorry about its being so late.
it'sPronunciation: (its), [key]1.
contraction of it is: It's starting to rain.
contraction of it has: It's been a long time.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.