(heraldry) Having the tail hanging down.

A pessimistic belief that things are in decline.

An instrument for taking the declination or angle which a plane makes with the horizontal plane. / (obsolete) A dissenter.

declinate

(rare) The act of declining or refusing.

Having a decline or slope.

One who declines. / (finance) A company's stock which is falling in price.

plural of decliner

(grammar) Capable of being declined.

(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.