ETYM Apparently corrupted from French déclinaison, from Latin declinatio, from declinare. Related to Decline, Declination.
1. A class of nouns having the same inflectional forms.
2. The complete set of inflected forms of a noun or pronoun or adjective.
3. The inflection of nouns and pronouns and adjectives.
4. Decline; Grammar, group of nouns with same inflection; naming the inflections of nouns. + prikaži više

ETYM Latin declinatio a bending aside, an avoiding: cf. French déclination a decadence. Related to Declension.
(Astronomy) The angular distance to a point on a celestial object measured north or south from the celestial equator, expressed in degrees; used to specify positions on the celestial sphere; SYN. celestial latitude, DEC.
Bending; turning aside; angle between magnetic needle and geographical meridian; Astronomy, angular distance from equator; (polite) refusal.
In astronomy, the coordinate on the celestial sphere (imaginary sphere surrounding the Earth) that corresponds to latitude on the Earth's surface. Declination runs from 0ş at the celestial equator to 90ş at the north and south celestial poles. + prikaži više

Instrument for taking the declination or angle which a plane makes with the horizontal plane

Non-acceptance, polite rejection