Definition of "Nut" :

noun: a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt

noun: one of the two male reproductive glands that produce spermatozoa and secrete androgens

noun: Egyptian goddess of the sky

noun: someone who is so ardently devoted to something that it resembles an addiction

"A car nut."

noun: a whimsically eccentric person

noun: usually large hard-shelled seed

noun: half the width of an em

verb: gather nuts