According to Dictionary.com, "consistent" means adhering to the same principles constantly, such as a consistent opponent. It also means holding firmly together or adhering. "Consistent" also means accordant or agreeing, not self-contradictory, such as: "His views and actions are consistent."
Synonyms of the adjective "consistent" include "consonant," "harmonious," "congruous" and "conformable." A related form of the word "consistent" includes the adverb "consistently." In math, consistency can represent two or more equations satisfied by a common set of variables. An example sentence using the word "consistent" is "To create a consistent floral pattern, draw one flower carefully and photocopy it several times." The word has Latin origins; its earliest appearances in written English date back to the mid- to late 16th century.