- an informal, simplified spelling of low1, used especially in labeling or advertising commercial products: lo calorie.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- look! see! (now often in the phrase lo and behold)
Old English lā
Word Origin and History for loer
early 13c., from Old English la, exclamation of surprise, grief, or joy; influenced in Middle English by lo!, short for lok "look!" imperative of loken "to look" (see look (v.)). Expression lo and behold attested by 1779.
Online Etymology Dictionary, © 2010 Douglas Harper