Please, dear teachers and friends
Couldyou shed some light on this?
SEND
v.tr.
1. To cause to be conveyed by an intermediary to a destination: send goods by plane.
2. To dispatch, as by a communications medium: send a message by radio.
3. a. To direct to go on a mission: sent troops into the Middle East.
b. To require or enable to go: sent her children to college.
c. To direct (a person) to a source of information; refer: sent the student to the reference section of the library.
4. a. To give off (heat, for example); emit or issue: a stove that sends forth great warmth.
b. To utter or otherwise emit (sound): sent forth a cry of pain.
5. To hit so as to direct or propel with force; drive: The batter sent the ball to left field. The slap on my back sent me staggering.
6. To cause to take place or occur: We will meet whatever vicissitudes fate may send.
7. a. To put or drive into a given state or condition: horrifying news that sent them into a panic.
b. Slang To transport with delight; carry away: That music really sends me.
v.intr.
1. To dispatch someone to do an errand or convey a message: Let's send out for hamburgers.
2. To dispatch a request or order, especially by mail: send away for a new catalogue.
3. To transmit a message or messages: The radio operator was still sending when the ship went down.
Phrasal verb:
SEND IN:
1. To cause to arrive or to be delivered to the recipient: Let's send in a letter of protest.
2. Sports To put (a player) into or back into a game or contest: The coach is sending in the kicker.
3. To cause (someone) to arrive in or become involved in a particular place or situation: The commander sent in the sappers. It's time to send in the lawyers.
Bottom line is... what's the difference between 'send' and 'send in'?
What's the difference between these?
Let's send in a letter of protest.
Let's send a letter of protest.
Thanks

