Singular terms are as expressions that purport to denote or designate particular individual people, places, or other objects. They contrast with general terms (such as "car" or "chair") which can apply to more than one thing.
There are various kinds of singular terms: proper names (e.g. "Matthew"), definite descriptions (e.g. "the second fisherman in the boat"), singular personal pronouns (e.g. "she"), demonstrative pronouns (e.g. "this"), etc.
Historically, various definitions for "singular term" have been offered: