adj. Characterized by a moderate, unperturbed, or tranquil quality, especially:adj. Pleasant in manner; smooth: a bland smile. adj. Not irritating or stimulating; soothing: a bland diet. adj. Exhibiting no personal worry, embarrassment, or concern: told a series of bland lies. adj. Dull and insipid: a bland little drama. adj. Having little or no distinctive flavor: bland cooking.