plural rotations
1
a
: the act or process of moving or turning around a central point
the rotation of the Earth around its axis
the rotation of the Moon around the Earth
b
: a complete turn around a central point
The Earth makes one rotation every day.
2
a
: the act of regularly changing something by replacing it with something else
crop rotation
Alfalfa and corn are planted in rotation.
b
: the act of regularly changing the place or position of things or people so that each takes the place of another
the rotation of the job of club president
The car needs a tire rotation.
3
US
: the group of people who take turns doing something
Where are we in the rotation? [=when is it our turn?]
(baseball) The team has a good (starting) rotation. [=group of pitchers who start games]
Cite this Entry
“Rotation.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/rotation. Accessed 16 Jun. 2026.
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