1
general::
Phrase(s): signal for someone
to make a sign for someone to come. • I signaled for the waiter and got the check. • Ted signaled for the parking lot attendant., Phrase(s): signal for something
to make a sign that something should be done. • I caught the waiter’s eye and signaled for the check. • The director signaled for applause.
McGrawhill's American Idioms And Phrasal Verbs