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English definition of “sneak”

sneak

verb (LOOK)    /sniːk/ (sneaked or US also snuck, sneaked or US also snuck)
sneak a look/glance at sb/sth C2 to look at someone or something quickly and secretly: I noticed him sneak a look at what I was writing.
(Definition of sneak verb (LOOK) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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