verb
-lists; -listed; -listing
[+ obj] to get the support and help of (someone or something)
to get (help, support, sympathy, etc.) from someone
[+ obj] :to sign up (a person) for duty in the army, navy, etc.
[no obj] :to become a member of the army, navy, etc.
[no obj] :to become involved with a large group of people in a cause, movement, etc.