acclaim (v.) Look up acclaim at
early 14c., "to lay claim to," from Latin acclamare "to cry out at" (in Medieval Latin "to claim"), from ad- "toward" (see ad-) + clamare "cry out" (see claim (v.)). The meaning "to applaud" is recorded by 1630s. The spelling has been conformed to claim. Related: Acclaimed; acclaiming; acclamatory.
acclaim (n.) Look up acclaim at
"act of acclaiming, a shout of joy," 1667 (in Milton), from acclaim (v.).