nod

US /nɑːd/
UK /nɑːd/
"nod" picture
1.

lower and raise one's head slightly and briefly, especially in greeting, assent, or understanding, or to give a signal

:
•
She gave a quick nod of approval.
•
He responded with a silent nod.
:
bowinclinationsignalgesture
1.

lower and raise one's head slightly and briefly, especially in greeting, assent, or understanding, or to give a signal

:
•
She nodded in agreement.
•
He nodded to acknowledge her presence.
:
bowinclineassentsignalgesture
2.

allow one's head to fall forward when drowsy or asleep

:
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The old man began to nod off in his armchair.
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She was so tired she kept nodding.
:
dozedrowseslumbersnooze
:
nod off