practical (adj.)

early 15c., practicale "of or pertaining to matters of practice; applied," with -al (1) + earlier practic (adj.) "dealing with practical matters, applied, not merely theoretical" (early 15c.), or practic (n.) "method, practice, use" (late 14c.). In some cases directly from Old French practique (adj.) "fit for action," earlier pratique (13c.) and Medieval Latin practicalis, from Late Latin practicus "practical, active," from Greek praktikos "fit for action, fit for business; business-like, practical; active, effective, vigorous," from praktos "done; to be done," verbal adjective of prassein, prattein "to do, act, effect, accomplish."

Practical joke "trick played on someone for the sake of a laugh at his expense" is from 1771 (earlier handicraft joke, 1741).

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Definitions of practical from WordNet

practical (adj.)
being actually such in almost every respect;
a practical failure
Synonyms: virtual
practical (adj.)
concerned with actual use or practice;
the idea had no practical application
woodworking is a practical art
he is a very practical person
a practical knowledge of Japanese
practical (adj.)
guided by practical experience and observation rather than theory;
completely practical in his approach to business
Synonyms: hardheaded / hard-nosed / pragmatic
practical (adj.)
having or put to a practical purpose or use;
practical mathematics
practical applications of calculus