1 : in an upward and forward direction across something ▪ The wall's too high for us to climb over. ▪ We came to a stream and jumped over. ▪ Throw the ball over.
2 a : downward from an upright position ▪ She leaned over and kissed him. ▪ I hurt my back bending over [=down] to pick up my child. b : downward to a flat or horizontal position ▪ She knocked over the lamp. ▪ He tripped and fell over. [=down] ▪ A couple of trees fell over during the storm.
3 : so that the bottom or opposite side is on top ▪ The baby rolled over onto his stomach. ▪ Turn/Flip your cards over.
4 a : from one place to another place ▪ We sent over a card and a basket of fruit. ▪ The teacher called the three girls over. ▪ Come over here. I need to talk to you. ▪ I'm flying over to London this afternoon. ▪ He ran over to his neighbor's house to see what was going on. ▪ Let's head over to the cafeteria. ▪ I'll be right over. ▪ Could you move over a little, please? I need some more space. ▪ Do you want to come over to my place? b : to your home ▪ I invited some friends over for dinner. ▪ They're nice. Why don't you ask them over some time? c : in a particular place ▪ Their house is two streets over (from here). ▪ They're building a new library over by the high school. ▪ Who's that man over by the door? ▪ It's summer now over in Australia. ▪ I grew up in the next town over. [=the town that is next to this town]
5 : from one person or group to another ▪ And now over to our foreign correspondent for the news from abroad. ▪ It's mine! Hand it over! ▪ They turned over the stolen money to the police. —often used figuratively ▪ After years of supporting the Democrats, she suddenly went over to the Republican side. ▪ He's gone over to the opposition.
6 : more than an expected or stated amount or number ▪ The show ran a minute over. = The show ran over by a minute. ▪ The condition is most common in women 65 and over. ▪ Children eight and over [=children who are eight years old and older] may participate in the contest. ▪ At this restaurant, parties of six or over will have a 20 percent gratuity added to their bill.
7 : remaining and not used ▪ We ate the turkey that was left over from Thanksgiving Day dinner. ▪ Most of the money would be spent on fixing the house with some left over for emergencies.
8 : during or throughout a period of time : until a later time (such as the next day) ▪ Do you have enough money to tide you over? ▪ Feel free to stay over [=overnight] if you don't want to drive home tonight. ▪ Mom, can I sleep over [=can I spend the night] at Carrie's house?
9 : so as to cover the entire surface of something ▪ The sky had clouded over [=it had become covered with clouds], and it was beginning to rain. ▪ The empty house's windows had been boarded over several years ago. ▪ He's become famous the world over. [=throughout the world]
10 a : in a complete and thorough way ▪ I'll have to talk the matter over with my wife. ▪ She's still thinking it over. b : from the beginning to the end ▪ Read it over [=through] and let me know what you think.
11 a chiefly US : one more time : again ▪ You've done it wrong. Do it over. ▪ Let's start over (again) from the beginning. ▪ He lost the computer file and had to do his assignment over. b —used to say how many times something is done or repeated ▪ I had to read the poem twice over [=two times] before I understood its meaning. c —used to say that something is done or happens repeatedly ▪ She became a millionaire many times over. [=she earned many millions of dollars] ▪ I remind him over and over (again) not to leave the door open. ▪ Say the lines over and over until you have memorized them.
12 —used when talking on a radio to show that a message is complete ▪ “We are ready for takeoff instructions. Over.”