1. Capable of being relied on; dependable: a reliable assistant; a reliable car.
2. Yielding the same or compatible results in different clinical experiments or statistical trials.
re·li′a·bili·ty, re·lia·ble·ness n.
Synonyms: reliable, dependable, responsible, trustworthy, trusty
These adjectives mean worthy of reliance or trust: a reliable source of information; a dependable worker; a responsible babysitter; a trustworthy report; a trusty assistant.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.