0 to produce something in a way that causes it to spread out from a central point: --
1 to send something to a lot of different people, usually by post or email: --
We sent out the wedding invitations about three weeks ago.
2 to produce something in a way that causes it to spread out from a central point: --
The equipment sent out a regular high-pitched signal.
3 to send something to a lot of different people, usually by mail or email: --