lengthen
verb [ I or T ] uk/ˈleŋ.θən/ us/ˈleŋ.θən/
C1 延长，拉长，加长；变长
to make something longer, or to become longer
I'll have to lengthen this skirt. 我必须把这条裙子放长一些。
lengthening waiting lists 越来越长的等候者名单
推迟;延迟，延期
If you lengthen something, or it lengthens, it takes longer to happen.
There is a plan to lengthen the three-year course to four years. 计划要将3年的课程延长为4年。
Opposite: shorten