'Sender' definitions:

Definition of 'sender'

From: WordNet
noun
Someone who transmits a message; "return to sender" [syn: sender, transmitter]
noun
Set used to broadcast radio or tv signals [syn: transmitter, sender]

Definition of 'Sender'

From: GCIDE
  • Sender \Send"er\, n. One who sends. --Shak. [1913 Webster]