1530, replacing earlier steadfast, from stead + adj. suffix -y, perhaps on model of M.Du., M.L.G. stadig. O.E. had stæððig "grave, serious," and stedig "barren," but neither seems to be the direct source of the modern word. O.N. cognate stoðugr "steady, stable"
was closer in sense. Originally of things; of persons or minds from 1602. Meaning "working at an even rate" is first recorded in 1548. The verb also is first recorded 1530. Noun meaning "one's boyfriend or girlfriend" is from 1897; to go steady is 1905 in teenager slang. Steady progress is etymologically a contradiction in terms. Steady state first attested 1885; as a cosmological theory (propounded by Bondi, Gold, and Hoyle), it is attested from 1948.
n. a boyfriend or girlfriend. : She showed up with Tom, her steady for the past few months.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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