WordReference Random House Learner's Dictionary of American English © 2014
snick•er /ˈsnɪkɚ/USA pronunciation alsosnigger /ˈsnɪgɚ/USA pronunciation snigger v. [no object]
    to laugh quietly but disrespectfully:The children snickered when the teacher turned his back.[+ at + object]They snickered at his attempt to roller-skate.

n. [countable]
    a snickering laugh.

Collins Concise English Dictionary © HarperCollins Publishers::

snicker /ˈsnɪkə/ n
  1. chiefly US Canadian a sly or disrespectful laugh, esp one partly stifled
  1. to utter such a laugh
    Equivalent term (in Britain and certain other countries): snigger
  2. (of a horse) to whinny
Etymology: 17th Century: probably of imitative origin

'snicker' also found in these entries:

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