The definition of prim is a proper, precise and formal person.(adjective)
An example of prim is a traditional fifties housewife who does not wear casual clothes, and instead is always dressed as if she is ready to leave the house.
See prim in Webster's New World College Dictionary
Origin: < ? MFr prim, prime, first (also sharp, thin, slender; hence, neat) < L primus, first: see prime
See prim in American Heritage Dictionary 4
adjective prim·mer, prim·mest
Origin: Possibly from obsolete prim, formal or demure person
Origin: , perhaps from Old French prin, first, delicate; see Prime.
Origin: Short for obsolete primprint
Origin: , of unknown origin.
Learn more about prim