querulous (KWĔR-ə-ləs) Definition (Adjective) Of a person: complaining, given to complaining, full of complaints; fault-finding; peevish. In Context "They reminded him of his maternal grandmother in her last years, when, far from being a strong, sensible, courageous woman, she grew weak and querulous, her expression of general discontent increasing with her vulnerability." Patrick O'Brian, Desolation Island, 1978.