1. touch base: to make contact, to check in with someoneOriginally Posted by ski
I want to touch base with Jack before we decide.
2. shed light on: to illuminate, to explain
Hopefully, this new manual will shed some light on our problem.
3. play by ear: literal -- to play a musical instrument without reading music.
figurative -- to perform any task without the needed practice or preparation
My daughter can play the sonata by ear.
I haven't finished the report for the meeting so we'll play it by ear.