What does consistent mean?
"Consistent" is an adjective describing something that behaves or appears in the same reliable way over time, or something that agrees with established facts, rules, or other evidence. A consistent athlete delivers similar performances week after week; a consistent argument contains no internal contradictions. In its second sense, the word typically appears in the phrase "consistent with," as when scientific findings are said to be consistent with a broader theory, meaning they fit alongside it without conflict. The word carries a broadly positive connotation, implying dependability, fairness, and discipline — qualities valued in work, relationships, and reasoning alike. It derives from the Latin consistere, "to stand firm or together," via the same root that gives us "persist" and "exist." Its derivatives include "consistency," "consistently," and the opposite, "inconsistent." Whether describing steady effort or logical coherence, "consistent" captures the idea of things standing firmly and reliably together.
(of a person, behavior, or process) always acting or done in the same way over time, especially in a way that is reliable or fair.
"Her consistent training schedule made her the strongest swimmer on the team."
(usually with "with") in agreement or compatibility with something else; free from contradiction.
"The witness's statement was consistent with what the police had already recorded."
The Latin root of "consistent" literally means "to stand together" — so when you're being consistent, your actions are standing together as one.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of consistent
"Consistent" comes from the Latin verb consistere, meaning "to stand still, stop, or stand firm," formed from com- ("together") + sistere ("to cause to stand"). It entered English in the mid-17th century, initially carrying senses of standing together physically or cohering as a whole, before settling into its modern senses of steadiness over time and agreement with other facts or principles. It shares this Latin root with words such as "persist," "insist," and "exist."
Related word forms
How consistent is actually used
"Consistent" is neutral to positive in connotation — it usually implies dependability. In formal writing, the phrase "consistent with" is standard for indicating logical or factual compatibility, as in "findings consistent with earlier research." The stress falls on the second syllable: kən-SIS-tent.
Easily confused with consistent
"Consistent" emphasizes agreement or reliability across instances, while "constant" means unchanging in value or occurring continuously without interruption.