from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The point on the celestial sphere that is directly above the observer.
- n. The upper region of the sky.
- n. The highest point above the observer's horizon attained by a celestial body.
- n. The point of culmination; the peak: the zenith of her career. See Synonyms at summit.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The point in the sky vertically above a given position or observer; the point in the celestial sphere opposite the nadir.
- n. The highest point in the sky reached by a celestial body.
- n. Highest point or state; peak.
from the GNU version of the Collaborative International Dictionary of English
- n. That point in the visible celestial hemisphere which is vertical to the spectator; the point of the heavens directly overhead; -- opposed to
- n. hence, figuratively, the point of culmination; the greatest height; the height of success or prosperity.
from The Century Dictionary and Cyclopedia
- n. The vertical point of the heavens at any place, or the point directly above an observer's head; the upper pole of the celestial horizon. The opposed pole is the nadir.
- n. Figuratively, the highest point, or summit, as of one's fortune; the culmination.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Middle English senith, from Old French cenith, from Medieval Latin, from Arabic samt (ar-ra's), path (over the head), from Latin sēmita, path.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English senith, from cinit, from Old French cenit and/or Latin cenit, a transliteration of Arabic سمت (samt, "direction, path") which is in itself a weak abbreviation of سمت الرأس (samt ar-ra's, "direction of the head"). (Wiktionary)