Used other than figuratively or idiomatically: see best, friend. / An especially close and trusted friend. / (informal) An object or concept considered very useful or helpful.

plural of partnership

A large, fluffy semi-longhair domestic cat of a breed that originated in Maine.

(idiomatic, especially military, of a fighting person, unit, or vehicle) To make one's opponent pay a very high price to defeat or obtain (a person, unit, vehicle, or territory).