1. [noun] a condition inferior to an earlier condition; a gradual falling off from a better state
    Synonyms: decline

  2. [noun] (astronomy) the angular distance to a point on a celestial object measured north or south from the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere
    Synonyms: celestial latitude, DEC

  3. [noun] a downward slope or bend
    Synonyms: descent, declivity, fall, decline, declension, downslope

  4. [noun] a polite refusal of an invitation
    Synonyms: regrets


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