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line up on

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line someone or something up on something

to place people or things into a line oriented on one or more things. Line them all up on the edge of the grass. Line up the children on the white line.

See also: line, on, up

line up on something

to form a line oriented on something. Line up on the white line painted on the pavement. Please line up on the marks on the floor.

See also: line, on, up