DECLINATION

n. refusal, rejection; of or pertaining to declension (Grammar)

In astronomy, declination (abbrev. dec or δ) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Dec is comparable to latitude, projected onto the celestial sphere, and is measured in degrees north and south of the celestial equator. Therefore, points north of the celestial equator have positive declinations, while those to the south have negative declinations.
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Noun
1. a condition inferior to an earlier condition; a gradual falling off from a better state
(synonym) decline
(hypernym) condition, status
(hyponym) neglect, disuse
(derivation) worsen, decline
2. (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
(synonym) celestial latitude, DEC
(hypernym) angular distance
(classification) astronomy, uranology
3. a downward slope or bend
(synonym) descent, declivity, fall, decline, declension, downslope
(hypernym) slope, incline, side
(hyponym) downhill
(derivation) decline
4. a polite refusal of an invitation
(synonym) regrets
(hypernym) refusal
(derivation) refuse, reject, pass up, turn down, decline

n. declination

(n.)
The arc of the horizon, contained between the vertical plane and the prime vertical circle, if reckoned from the east or west, or between the meridian and the plane, reckoned from the north or south.
  

(n.)
The angular distance of any object from the celestial equator, either northward or southward.
  

(n.)
The act or state of falling off or declining from excellence or perfection; deterioration; decay; decline.
  

(n.)
The act or state of declining or refusing; withdrawal; refusal; averseness.
  

(n.)
The act or state of bending downward; inclination; as, declination of the head.
  

(n.)
The act of inflecting a word; declension. See Decline, v. t., 4.
  

(n.)
The act of deviating or turning aside; oblique motion; obliquity; withdrawal.