1. (

• sender ,
• transmitter

) someone who transmits a message; "return to sender" ;

2. (

• vector ,
• transmitter

) any agent (person or animal or microorganism) that carries and transmits a disease; "mosquitos are vectors of malaria and yellow fever"; "fleas are vectors of the plague"; "aphids are transmitters of plant diseases"; "when medical scientists talk about vectors they are usually talking about insects" ;

3. (

• transmitter ,
• sender

) set used to broadcast radio or tv signals ;