needless repetition of an idea, especially in words other than those of the immediate context, without imparting additional force or clearness, as in “widow woman.”
2.
an instance of such repetition.
3.
Logic.
a.
a compound propositional form all of whose instances are true, as “A or not A.”
b.
an instance of such a form, as “This candidate will win or will not win.”
Origin: 1570–80; < Late Latin tautologia < Greek tautología.See tauto-, -logy
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a chattering or flighty, light-headed person.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
1579, from L.L. tautologia "representation of the same thing" (c.350), from Gk. tautologia, from tautologos "repeating what has been said," from tauto "the same" + -logos "saying," related to legein "to say" (see lecture).