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Related to descension: dissention, ascension, chagrin, tentatively, tenacity, defied, behooves
1. the action of descending; descent
2. astronomy the setting (descent below the horizon) of a celestial body
3. astronomy the section of the sky which descends below the horizon along with a given celestial body
1. (in astrology) the part of the zodiac in which the influence of a planet is weakest. Compare exaltation (def. 4).