Etymology
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intercept (v.)

c. 1400, "to cut off" (a line), "prevent" (the spread of a disease), from Latin interceptus, past participle of intercipere "take or seize between, to seize in passing," from inter "between" (see inter-) + -cipere, combining form of capere "to take, catch," from PIE root *kap- "to grasp." Related: Intercepted; intercepting.

intercept (n.)

"that which is intercepted," from intercept (v.). From 1821 of a ball thrown in a sport; 1880 in navigation; 1942 in reference to secret messages.

updated on October 09, 2017

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Definitions of intercept from WordNet
1
intercept (v.)
seize on its way;
The fighter plane was ordered to intercept an aircraft that had entered the country's airspace
Synonyms: stop
intercept (v.)
tap a telephone or telegraph wire to get information;
Synonyms: wiretap / tap / bug
2
intercept (n.)
the point at which a line intersects a coordinate axis;
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.