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For the special uses of over in phrasal verbs, look at the entries for the verbs. For example take something over is in the phrasal verb section at take.
1 downwards and away from a vertical positionTry not to knock that vase over.The wind must have blown it over.
2 from one side to another sideShe turned over onto her front.The car skidded off the road and rolled over and over.
3 across a street, an open space, etcI stopped and crossed over.He rowed us over to the other side of the lake.They have gone over to France.This is my aunt who's over from Canada.I went over (= across the room) and asked her name.Put it down over there.
4 so as to cover somebody/something completelyThe lake was frozen over.Cover her over with a blanket.
5 above; morechildren of 14 and overYou get an A grade for scores of 75 and over.
6 remaining; not used or neededIf there's any food left over, put it in the fridge.
7 againHe repeated it several times over until he could remember it. (North American English) It's all wrong—you'll have to do it over.
8 endedBy the time we arrived the meeting was over.Thank goodness that's over!I was glad when it was over and done with.
9 used to talk about somebody/something changing positionHe's gone over to the enemy (= joined them).Please change the wheels over (= for example, put the front wheels at the back).Let's ask some friends over (= to our home).Hand over the money!10 used when communicating by radioMessage received. Over (= it is your turn to speak).Message understood. Over and out.Idioms

(all) over again
a second time from the beginning
He did the work so badly that I had to do it all over again myself.over against something
in contrast with something
over and over (again)
many times; repeatedly
I've told you over and over again not to do that.over to you
used to say that it is somebody's turn to do something

ˈəʊvə(r)
ˈoʊvər