1.
If you send out things such as letters or bills, you send them to a large number of people at the same time.
She had sent out well over four hundred invitations that afternoon.
PHRASAL VERB : V P n (not pron) , also V n P
2.
To send out a signal, sound, light, or heat means to produce it.
The crew did not send out any distress signals...
PHRASAL VERB : V P n (not pron) , also V n P
3.
When a plant sends out roots or shoots, they grow.
If you cut your rubber plant back, it should send out new side shoots.
= produce
PHRASAL VERB : V P n (not pron) , also V n P