Top Definition
ost
Original Soundtrack
by Anonymous September 08, 2003

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OST
Short stand for "Original Sound Track".

-Recorded music accompanying and synchronized to the images of a motion picture, television program or video game
-A commercially released soundtrack album of music as featured in the soundtrack of a film or TV show
-The physical area of a film that contains the synchronized recorded sound.
Guy1: hey Guy2 i just got the OST "The Eye of the Tiger" from the movie Rocky III to my iPod.

Guy2: cool Guy1, let me listen to it.

by netoxic January 23, 2009

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Original Sound Track

-''Hey did u heard da OST from grease?''
by cApRiiCoOl August 20, 2008

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Ost
To undo, take back or recall, change one's mind
1) I'm so glad I could ost that sext I accidentally sent to my dad!

2) Did you ost that email to Jake?

3) I'm so glad I osted that tweet before the media storm.

4) By osting the text message, Tom avoided an extremely awkward encounter with his boss.
by On Second Thought March 29, 2015

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OST
stands for "original sound track", means the first version of a track featured in movies, animations or video games
Street fighter got the best OST ever
by ◕_~ August 19, 2016

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ost
An act of plagiarism and claiming it as your own.
Wow dude you just totally OSTed that essay from the Internet.
by KoolKats99 July 23, 2016

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Ost
Norwegian for cheese
Oh noes Ole! Your hode looks like en ost!
by bobolamedbukkake October 30, 2004

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