## Meanings
1. A polite refusal of an offer or invitation.
2. A downward slope or bend.
3. In astronomy, how far north or south a star or planet is from the celestial equator.

## Examples
- We received his declination of the invitation with regret.
- The slight declination of his head signalled his agreement.
- The star's declination tells astronomers its position in the sky.

## Derived Forms
- codeclination
- declinational

## Related Forms
- decline

## Roots and Affixes
- Root: *ḱley-
- Root: declinacioun
- Root: declination
- Root: declinatio

## Etymology
From Middle English declinacioun, borrowed from Middle French declination, from Latin declinatio. Doublet of declension.

## AI Etymology
Declination is from Middle English declinacioun, borrowed from Middle French declination, from Latin declinatio. Doublet of declension. Important recorded forms include *ḱley- (Proto-Indo-European), declinacioun (Middle English), declination (Middle French), and declinatio (Latin). Current senses include a polite refusal of an offer or invitation and a downward slope or bend. The wider family includes derived forms such as codeclination and declinational; related words such as decline.

## Topics
- Space, Position & Direction
- Places & Geography
- Word Formation & Derivatives

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