n [U, C]
1 arrangement in a straight line 排成直线
*The sights of the gun must be in alignment with the target. 枪的瞄准器必须与射击目标对准成一线.
2 (esp political) arrangement in groups （尤指政治上的）联盟
*the alignment of Japan with the West 日本与西方的联盟.
3 (idm 习语) out of alignment not in line 不成一直线.

n
[U]
the state of being arranged in a line with something or parallel to something
alignment of
　the geometrical alignment of the Sun, Moon and Earth at the eclipse
out of/into alignment
　The wheels were out of alignment.
[U and C]
support given by one country or group to another in politics, defence etc
alignment with
　their military alignment with the US