Definition of "leer" []

• To look with a sidelong glance, indicative especially of sexual desire or sly and malicious intent. (verb-intransitive)
• A desirous, sly, or knowing look. (noun)

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.

• "Gladys, overhearing, gave us all a grin, or perhaps the word leer describes it better, revealing that she had very few teeth and that the ones which were left were horridly like fangs."
• "I wonder now, when I recall his leer, that I did not collar him, and try to shake the breath out of his body."
• "Her smile is now more sneer than leer, which is how I know she respects me somewhat."