from The American Heritage® Dictionary of the English Language, 4th Edition
- interj. Used to attract attention or to show surprise.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- interj. Look, see, behold (in an imperative sense).
- hello ('lo; see hallo)
- adj. Informal spelling of low.
from the GNU version of the Collaborative International Dictionary of English
- interj. Look; see; behold; observe.
from The Century Dictionary and Cyclopedia
- Look! see! behold! observe!—used to invoke or direct the particular attention of a person to some object or subject of interest.
- n. A North American Indian.
Middle English, from Old English lā.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English lo, loo, from Old English lā (exclamation of surprise, grief, or joy). Conflated in Middle English by lo! (interjection), a corruption of lok!, loke! ("look!") (as in lo we! (look we!)). Cognate with Scots lo, lu ("lo"). See also look. (Wiktionary)
Variant of low. (Wiktionary)