a sacred song or poem; hymn
2. [usually P-]
any of the sacred songs in praise
constituting the Book of Psalms in the Bible
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'psalm'ME psalme, saume < OE sealm < LL(Ec) psalmus < Gr psalmos, a twanging with the fingers (in LXX & N.T., song sung to the harp) < psallein, to twitch, pluck