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

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

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

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

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

6. (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.

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

Cartesian coordinates aberrancy aberration abjuration abjurement abnegation abscissa altitude azimuth bend bias branching off cascade cataract chucking chucking out chute circuitousness collapse comedown contempt contradiction coordinates corner crash crook crosswiseness curve cylindrical coordinates debacle debasement decadence decadency declension declinature decline declining deflection deflexure defluxion deformation degeneracy degenerateness degeneration degradation demotion denial departure depravation depravedness depreciation deprivation derogation descending descension descent despisal despising deterioration detour deviance deviancy deviation deviousness devolution diagonality digression disagreement disallowance disapproval discard disclaimer disclamation discounting discursion dismissal disobedience disownment disregard dissent divagation divarication divergence diversion dogleg double down downbend downcome downcurve downfall downflow downgrade downpour downrush downtrend downturn downward mobility downward trend drift drifting drop dropping dying ebb ebbing effeteness equator coordinates errantry exception exclusion excursion excursus exorbitation fading failing failure failure of nerve fall falling falling-off gravitation hairpin holding back ignoring inclination indirection indirectness involution lapse latitude longitude loss of tone nay negation negative negative answer nix no nonacceptance nonapproval noncompliance nonconformity nonconsent nonconsideration nonobservance obliqueness obliquity ordinate passing by pererration plummeting polar coordinates pounce putting away putting out rambling rapids rebuff recantation refusal regression rejection renouncement repudiation repulse retention retrocession retrogradation retrogression right ascension scouting sheer shift shifting shifting course shifting path skew skewness slant slippage slump spurning squint stoop straying sweep swerve swerving swinging swoop tack throwing out thumbs-down transverseness turn turndown turning turning out twist unwillingness vagary variation veer wandering wane waning warp waterfall withholding yaw zigzag