"conventional," especially "heterosexual," 1941, a secondary sense evolved from straight (adj.1), probably suggested by straight and narrow path "course of conventional morality and law-abiding behavior," which is based on a misreading of Matthew vii.14 (where the gate is actually strait), and the other influence seems to be from strait-laced.
mid-14c., "narrow, confined space or place," specifically of bodies of water from late 14c., from Old French estreit, estrait "narrow part, pass, defile, narrow passage of water," noun use of adjective (see strait (adj.)). Sense of "difficulty, plight" (usually straits) first recorded 1540s. Strait and narrow "conventional or wisely limited way of life" is recorded from mid-14c. (compare straight (adj.2)).
1520s (transitive) "to restrict, make narrow," from strait (adj.) + -en (1). Related: straitened; straitening. Earlier verb was simply strait "to make narrow" (early 15c.).
"laced with alcohol," 1909, past-participle adjective from spike (v.).
Canadian French province, from Micmac (Algonquian) /kepe:k/ "strait, narrows." Related: Quebecois (n. and adj.), from French Québecois.
strait between the Aegean Sea and the Sea of Marmara, separating Europe from Asia, the classical Hellespont, probably from Dardanus (Greek Dardanos), name of an ancient city near Troy, on the Asia side of the strait, home of the Dardani, a people-name said to be from a mythical founder Dardanus, but this is likely folk-etymology. Related: Dardanian.
