/ sɪp; NAmE / verb , noun
■ verb
( -pp- ) sip (sth) | sip (at sth) to drink sth, taking a very small amount each time :
[ v ]
She sat there, sipping at her tea.
[ vn ]
He slowly sipped his wine.
■ noun
a very small amount of a drink that you take into your mouth :
to have / take a sip of water
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WORD ORIGIN
late Middle English : perhaps a modification of sup , as symbolic of a less vigorous action.