blotch(noun, verb) noun1. an irregularly shaped spotSimilar word(s): splodge, splotchDefinition categories: attribute, blot, daub, slur, smear, smirch, smudge, spot verb1. mark with spots or blotches of different color or shades of color as if stainedSimilar word(s): mottle, streakDefinition categories: creation, color, colorise, colorize, colour, colourise, colourize