Definitions
1.NounDownward movement, fall."The aircraft went into a sudden decline before the pilot regained control."
2.NounA sloping downward, e.g. of a hill or road."After taking a right from that turn a decline will come into view."
3.NounA deterioration of condition; a weakening or worsening."He has experienced a sudden decline in his health.; Educational standards are on the decline.; The country's global reputation is in decline."
4.NounA reduction or diminution of activity, prevalence or quantity."Population decline is a major concern.; Town-centre retailers have seen a decline in footfall."
5.NounThe act of declining or refusing something.
6.VerbTo move downwards, to fall, to drop."The dollar has declined rapidly since 2001."
7.VerbTo become weaker or worse."My health declined in winter."
8.VerbTo bend downward; to bring down; to depress; to cause to bend, or fall.
9.VerbTo cause to decrease or diminish.
10.VerbTo turn or bend aside; to deviate; to stray; to withdraw."a line that declines from straightness; conduct that declines from sound morals"
11.VerbTo choose not to do something; refuse, forbear, refrain."On reflection I think I will decline your generous offer."
12.VerbTo inflect for case, number, gender, and the like.
13.VerbTo recite all the different declined forms of (a word): to recite its declension.
14.VerbTo run through from first to last; to recite in order as though declining a noun.
15.VerbTo 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."The team chose to decline the fifteen-yard penalty because their receiver had caught the ball for a thirty-yard gain."