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The pilot of an aircraft initiates rotation after reaching V(r) speed in order to obtain the scheduled takeoff performance. The term rotation is used because the aircraft pivots around the axis of its main landing gear due to manipulation of the flight controls to make this change in aircraft attitude. The nose is usually brought to a 5 - 20 degree nose up attitude to create sufficient lift from the wings.
At 130 KCAS, the pilot moved the control column aft to 8.4 degrees to initiate rotation as the aircraft passed the 5500 ft mark of the runway 24. The aircraft began to rotate.
rotation by an4ljuggernaut August 4, 2006
Someone on freenode who is the same as RyanF.
Rotation is also known as RyanF from IRC.
Rotation by Anonymous_Observer August 18, 2004
The name of the bestest, coolest, funkiest song by trumpetmeister Herb Alpert. Released 24 years ago, it's still a piece of wonderful avant-garde mastery. To hell with all the pop crap he tried to release after 1979's Rise album!
Great song with a great "Chef" kinda voice saying:

"Ro-ro-ro-ta-a-a-a-tion-tion-tion-tionnnnn..."
rotation by Hugh Masekela April 25, 2004
An amount of 3-7 girls that you flirt, have sex with, and take on dates. They are pretty much side hoes that you rotate when and how often you spend time with them.
Sean: I heard you got a rotation

Chris: yea it’s true! I change the one I mess with about once a week so that it always feels fresh.
Sean: I only got a girl and 1 side hoe
Rotation by Bignibba7 October 14, 2020
“rotation” - to describe a hoe/player who is currently in their phase.
dude 1 - Have you heard anything about Jessica? I was really interested in her man.

dude 2 - Nah bro stay away from her, she’s in rotation right now. It’s better to look out for yourself then waste countless hours trying to talk to her.

rotation flirtation 

When a person spins in a circle in a flirtatious manner. Not to be confused with flirtation rotation.
Me: Hey, you like my outfit? *le twirl*

Every boy ever: Quit doing the rotation flirtation, I don't like you.