Etymology
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input (n.)

1753, "a sum (of cash) put in, a sharing, contribution," from verbal phrase; see in (adv.) + put (v.). Meaning "energy supplied to a device or machine" is from 1902, later of electronic devices; computing sense of "data fed into a machine" is from 1948, though this is perhaps from the verb in the computing sense.

input (v.)

late 14c., "put on, impose," from in (adv.) + put (v.). Modern sense "feed data into a machine" is from 1946, a new formation from the same elements.

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Definitions of input
1
input (n.)
signal going into an electronic system;
Synonyms: input signal
input (n.)
a statement that expresses a personal opinion or belief or adds information;
we would appreciate input from our users on how we can improve our software
Synonyms: remark / comment
input (n.)
any stimulating information or event; acts to arouse action;
input (n.)
a component of production; something that goes into the production of output;
2
input (v.)
enter (data or a program) into a computer;
From wordnet.princeton.edu