plural of 'nod': small downward movements of the head used as gestures (e.g., to show agreement, acknowledgement, or approval).

（複数形）頭を軽く下げる動作（同意・了解・承認などを示す身ぶり）

third-person singular present of 'nod': to lower and then raise the head slightly and briefly, especially to indicate agreement, acknowledgement, or greeting.

（動詞の三人称単数現在）（同意・返事・挨拶として）頭を軽く上下させること

third-person singular present of 'nod' (intransitive): to doze briefly; to begin to fall asleep (often used with 'off').

（自動詞）うたた寝をする、うとうとする（しばしば 'off' とともに用いられる）

third-person singular present of 'nod' (transitive, idiomatic): to give a sign of approval or permission to someone; to signal assent.

（他動詞・慣用）承認や許可の合図を出す、合図して許す