1. a deliberate rejection or avoidance of conventional style, fashion, or aesthetic conventions; a style characterized by the absence of traditional stylistic elements.
Usage: often used in art, fashion, and design contexts; may be informal or colloquial

Examples

• The designer's antistyle approach rejected all traditional ornamentation in favor of raw, unfinished materials.
• Her antistyle wardrobe consisted of mismatched thrift-store pieces that deliberately clashed.
• The artist embraced antistyle by painting on crumpled paper instead of canvas.
• Punk rock embodied an antistyle movement that opposed mainstream fashion norms.
• The minimalist interior design was an antistyle reaction to maximalist decoration.