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English definition of “line up”

line up

phrasal verb with line     /laɪn/ verb [T]
[I] to stand in a line: Thousands of people lined up to buy tickets on opening night.
to show your support for a person or idea: line up behind sb/sth A series of state and national leaders has lined up behind her fledgling candidacy.line up in support of sb/sth Despite the public's outrage, officers of the company have lined up in support of the policy.
(Definition of line up from the Cambridge Business English Dictionary © Cambridge University Press)
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