The Oxford Thesaurus An A-Z Dictionary of Synonyms - nod v.

1) greet, acknowledge, recognize: The maЊtre d'h“tel nodded to me as I entered the restaurant. 2) say yes; consent, assent, agree, concur, acquiesce: Asked if she had seen Nick, the barmaid nodded. I asked permission to leave the room and the teacher nodded. 3) doze (off) , nap, drowse, drop off, fall asleep: Exhausted travellers nodded in their chairs waiting for their flights to be announced. 4) slip (up) , err, make a mistake, be mistaken or wrong; be careless or negligent or lax or inattentive: Sometimes, even Homer nods. --n. 5) signal, sign, cue, indication, gesture: I saw him give a nod to the barber, who suddenly held a cutthroat razor to my throat. 6) approval; consent, acquiescence, concurrence, assent, agreement, Colloq OK or okay: The company has given me the nod to open an office in Acapulco.