Directed to one side; sideways: a sidelong glance. (adjective)
So as to slant; sloping.(adjective)
On or toward the side; sideways.(adverb)
In an oblique manner.(adverb)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "sidelong" in a sentence
"However, that old saw was repeated with a sidelong, meaningful glance at his middle son."
"His big dark eyes were steady and ironic, nose large, faintest ghost of a mustache, front teeth big and white in sidelong grin."
"In completely unrelated news, apparently, my old unintentional icon theme of upset-looking people with guns is being challenged by a new unintentional theme of icons of people looking sidelong at other people."