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Origin and history of principal

principal(adj.)

c. 1300, "main, principal, chief, dominant, largest, greatest, most important;" also "great, large," from Old French principal "main, most important," of persons, "princely, high-ranking" (11c.) and directly from Latin principalis "first in importance; original, primitive," from princeps (genitive principis) "first man, chief leader; ruler, sovereign," noun use of adjective meaning "that takes first," from primus "first" (see prime (adj.)) + root of capere "to take" (from PIE root *kap- "to grasp"). 

principal(n.)

c. 1300, "chief man, leading representative," also "the most part, the main part;" also, in law, "one who takes a leading part or is primarily concerned in an action or proceeding;" from principal (adj.) or from or influenced by noun uses in Old French and Latin.

From mid-14c. as "ruler, governor;" 1827 as "person in charge of a public school," though the meaning "head of a college or hall" was in English from mid-15c. From early 15c. as "a main sum of money," hence "money on which interest is paid."

Entries linking to principal

late 14c., "first, original, first in order of time," from Old French prime and directly from Latin primus "first, the first, first part," figuratively "chief, principal; excellent, distinguished, noble" (source also of Italian and Spanish primo), from Proto-Italic *prismos, superlative of PIE *preis- "before," from root *per- (1) "forward," hence "in front of, before, first, chief."

The meaning "of fine quality, of the first excellence" is from c. 1400. The meaning "first in rank, degree, or importance" is from 1610s in English. Arithmetical sense (as in prime number, one indivisible without a remainder except by 1) is from 1560s; prime meridian "the meridian of the earth from which longitude is measured, that of Greenwich, England," is from 1878. Prime time originally (c. 1500) meant "spring time;" the broadcasting sense of "peak tuning-in period" is attested by 1961.

c. 1300, principalite, "position of a prince," from Old French principalite "principal matter; power, sovereignty" (12c., Modern French principauté) and directly from Late Latin principalitatem (nominative principalitas), from principalis "first in importance; original, primitive" (see principal (adj.)).

Mid-14c. as "government by a prince." Meaning "region or state ruled by a prince or monarch" is attested from late 14c. Also in Middle English "state of being superior" (late 14c.).

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