noun, noun or participle which takes 'suru', intransitive verb
Physical turning around an axis or center. Used for wheels, gears, celestial bodies, and spinning motions.
地球は一日に一回自転し、一年で太陽の周りを回転する。
The Earth rotates once a day and revolves around the sun in a year.
モーターが高速で回転している。
The motor is spinning at high speed.
noun, noun or participle which takes 'suru', intransitive verb
working (of the mind); functioning
Metaphorical use for mental activity or the operation of a system. Often used with 頭 (head) or 頭脳 (brain).
彼は頭の回転が速い。
He is quick-witted.
今日は頭が回転しない。
My brain isn't working today.
noun, noun or participle which takes 'suru', intransitive verb
Used in business and economics for the turnover of goods, funds, or customers. Common in phrases like 資金回転 (capital turnover) and 客の回転 (customer turnover).
この店は客の回転が早い。
This shop has a fast customer turnover.
資金の回転を良くする方法を考えている。
We are thinking of ways to improve the circulation of funds.
noun, noun or participle which takes 'suru', intransitive verb
Mathematical term for rotation or curl in vector calculus.
ベクトル場の回転を計算する。
Calculate the curl of the vector field.
noun
Abbreviation of 回転競技 (slalom event). Used in skiing contexts.
See also: 回転競技
彼は回転で金メダルを取った。
He won the gold medal in the slalom.