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Related to level out: level off
To add to or subtract from the surface of something in order to make it level or smooth. A noun or pronoun can be used between "level" and "out." The timber was a bit uneven where they had cut it with the hand saw, so I leveled it out with my power sander. He kept adding soil to try to level out the area in front of the house, but the whole is just a mess now.
level something out
to cause something to assume a more level course or path. Level this path out before you open it to the public. They have to level out this roadway.
[for something that was going up and down] to assume a more level course or path. The road leveled out after a while and driving was easier. As we got down into the valley, the land leveled out and traveling was easier.