a noticeable deterioration in performance or quality; "the team went into a slump"; "a gradual slack in output"; "a drop-off in attendance"; "a falloff in quality"
fall heavily or suddenly; decline markedly; "The real estate market fell off"
fall or sink heavily; "He slumped onto the couch"; "My spirits sank"
the form of a word that is used to denote a singleton
being a single and separate person or thing; "can the singular person be understood apart from his culture?"; "every fact in the world might be singular...unlike any other fact and sole of its kind"-William James
grammatical number category referring to a single item or unit
composed of one member, set, or kind
the single one of its kind; "a singular example"; "the unique existing example of Donne's handwriting"; "a unique copy of an ancient manuscript"; "certain types of problems have unique solutions"