the size of something as given by the distance around it
the length of the closed curve of a circle
the boundary line encompassing an area or object; "he had walked the full circumference of his land"; "a danger to all races over the whole circumference of the globe"
a coupling that connects or disconnects driving and driven parts of a driving mechanism; "this year's model has an improved clutch"
a pedal or lever that engages or disengages a rotating shaft and a driving mechanism; "he smoothely released the clutch with one foot and stepped on the gas with the other"
a number of birds hatched at the same time
a tense critical situation; "he is a good man in the clutch"