-A past instance of active thought, to deliberate upon a problem or a solution.
-The action of thinking.
-The active analytic process of thinking and organizing information in order to make a decision.

The word date back from early 90's, when during a conversation between two person one needed to describe something but the word "pensive" was not suited to the sentence and thinking was too immediate.
"You seemed very thinkative today Jim! Is there anything wrong?"
by Robert Scales February 15, 2005
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Something an avetard does after you ask him a basic ass question. You can ask him the most simple shit and he will not respond for like 15 mins and when you ask him again he'll be like "i was thinking" it's pretty obvious that this dude is dumb as shit and useless af.
Aye stutt didn't answer my question about when his birthday is and its been 30 mins....oh he's just thinking.
by TurnM3Up November 21, 2019
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Slang for the endless stream of thoughts that plague your mind, one after the other, especially when trying to fall asleep.
I had a bad case of the thinks last night.
by Dr Bunnygirl November 9, 2019
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A complex process that typically involves head scratching and "Hmm" noises, and is often followed by an "aha!" in normal people, or a stupid comment in cheerleaders.
Steve: Suzy, do you want to go to the movies with me tonight?

Suzy: I can't; I'm thinking.
by Grent May 2, 2008
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The last thing most people do before acting.
An activity that's frowned upon and made taboo by every society, culture, religion, government, cult, fad, or any other large group of people.
Boss: We don't pay you to think, now GET BACK TO WORK!
by AYB May 28, 2003
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The process of enslaving one's brain cells to consider or reason about something.
I'm thinking of asking her if she wants to go visit the animal shelter.
by 40 Year-Old Divorced Dad August 22, 2019
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