declination

definition: a polite refusal of an invitation
example:
speech part: noun
synonyms: regrets
definition: (astronomy) the angular distance of a celestial body north or to the south of the celestial equator
example:
speech part: noun
synonyms: celestial latitude dec
definition: a downward slope or bend
example:
speech part: noun
synonyms: fall
definition: a condition inferior to an earlier condition
example:
speech part: noun
synonyms: decline

How declination is being used?