tautology

 
Pronunciation: /tɔːˈtɒlədʒi/

noun (plural tautologies)

[mass noun]
  • the saying of the same thing twice over in different words, generally considered to be a fault of style (e.g. they arrived one after the other in succession).
  • [count noun] a phrase or expression in which the same thing is said twice in different words.
  • Logic a statement that is true by necessity or by virtue of its logical form.

Derivatives

tautological

Pronunciation: /-təˈlɒdʒɪk(ə)l/
adjective

tautologically

Pronunciation: /-təˈlɒdʒɪk(ə)li/
adverb

tautologist

noun

tautologize

Pronunciation: /-dʒʌɪz/
(also tautologise) verb

tautologous

Pronunciation: /-ləgəs/
adjective

Origin:

mid 16th century: via late Latin from Greek, from tautologos 'repeating what has been said', from tauto- 'same' + -logos (see -logy)