The definition of a sender is someone who caused something to be sent to a recipient.
An example of a sender is the person who put a letter in the mailbox.
noun
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Also known as a source or a transmitter, a sender is a device that originates, or generates, an information transfer to one or more receivers. See also receiver and transmitter.
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A component of an electromagnetic crossbar (Xbar) or panel switch, a sender receives dialed digits from a register or routing information from a translator, and sends the appropriate dialed digits across a trunk or to local station equipment. See also panel switch, register, translator, and Xbar.
He is further the god of vegetation generally - Nomios, "god of pastures" (explained, however, by Cicero, as "god of law"), Hersos, " sender of the fertilizing dew."
Begin the letter at the top with the return address of the sender.
This consists of a receiving antenna similar to the sending antenna, and in any wireless telegraph station it is usual to make the one and the same antenna do duty as a receiver or sender by switching it over from one apparatus to the other.
The automatic curb sender was originally designed by Lord Kelvin for the purpose of diminishing the effect of inductive re- Au tardation in long cables.
No name was listed for the sender, only a return e-mail address of "metalman29."