Definition as Noun

• fastener that fastens together two ends of a belt or strap; often has loose prong
• a shape distorted by twisting or folding

Definition as Verb

• fasten with a buckle or buckles
• fold or collapse
• bend out of shape, as under pressure or from heat

• warp

• clasp

• crumple

• heave, warp

• "His knees buckled"

• "The highway buckled during the heat wave"

• Buckle vs warp
• Buckle vs clasp
• Buckle vs crumple
• Buckle vs heave