1.(in a particular direction)出发;进发
2.to be heading for sth or to be headed for sth
(for disaster, trouble)将要…;马上要…
The party is heading for defeat in the election.该党即将在大选中失利。
3.(form a head)plant +(甘蓝等)结球, 形成头部
4.(form a head)boil +长出脓头
5.<尤美>(rise)river, stream +起源;发源