line up
phrasal verb with line verb [ T ] uk/laɪn/ us
[ 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.