Longman Dictionary of Contemporary English - nod

~1 v nodded, nodding 1 to move your head up and down, especially in order to show agreement or understanding  (I asked her if she was ready to go, and she nodded. | nod your head)  (Jane nodded her head sympathetically. | nod your approval/agreement etc)  (show your approval etc by nodding) 2 to move your head down and up again once in order to greet someone or give someone a sign to do something + at/to  (The judge nodded at the foreman to proceed. | She nodded to us as she walked by.) 3 be on nodding terms (with)/have a nodding acquaintance (with) to know someone slightly or know a little about a subject  (Burke was already on nodding terms with a number of senators. | a nodding acquaintance with local history) nod off phr v to begin to sleep, when you do not intend to  (I missed the movie because I'd nodded off.) ~2 n 1 an act of nodding  (The woman greeted us with a nod of the head. | give a nod)  (I showed the doorman my card and he gave a friendly nod.) 2 give sb the nod BrE informal to give someone permission to do something  (We're waiting for the boss to give us the nod on this one.) 3 a nod's as good as a wink humorous used to tell someone that you have understood something, although it was said in an indirect way 4 on the nod BrE informal by general agreement and without discussion  (The chairman's proposals are usually passed on the nod.)  (- see also the land of nod land1 (9))