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1.
Positivity is staying positive even when you find a really good reason to be negative.
Thinking that being too stupid to create time travel is for the best because your dumb ass would probably use it to go back in time, pretend to be a Native American and teach the pilgrims how to rap shows positivity.

This is bad - One of our founding fathers, Thomas "T-Dog" Jeffersizzle, wrote the lyrics to the Ryhmes of Independence.
by Davendork November 08, 2010
 
2.
An outlook on life that involves seeing and focusing on the good aspects of a situation, no matter what the circumstances.
She may have been having a bad day, but she was still filled with positivity and knew she was lucky to be alive and breathing.
by pinkrobot November 07, 2010
 
3.
Weed, gunja, Puuf-puff, La-La, Grass, tweed, sticky
Tempress gets high off "positivity."
by Smoke Dogg February 18, 2005