Downward movement, fall.(Can we add an example for this sense?)

A sloping downward, e.g. of a hill or road.(Can we add an example for this sense?)

A deterioration of condition; a weakening or worsening.

A reduction or diminution of activity, prevalence or quantity.

The act of declining or refusing something.

(intransitive) To move downwards, to fall, to drop.

(intransitive) To become weaker or worse.

(transitive) To bend downward; to bring down; to depress; to cause to bend, or fall.

(transitive) To cause to decrease or diminish.

To turn or bend aside; to deviate; to stray; to withdraw.

(transitive) To choose not to do something; refuse, forbear, refrain.

(transitive, grammar, usually of substantives, adjectives and pronouns) To inflect for case, number, gender, and the like.

(transitive, grammar) To recite all the different declined forms of (a word).

(by extension) To run through from first to last; to recite in order as though declining a noun.

(American football, Canadian football) To reject a penalty against the opposing team, usually because the result of accepting it would benefit the non-penalized team less than the preceding play.