Dictionary definition · buckle
noun
- fastener that fastens together two ends of a belt or strap; often has loose prong
- a shape distorted by twisting or folding
verb
- fasten with a buckle or buckles
- fold or collapse"His knees buckled"
- bend out of shape, as under pressure or from heat"The highway buckled during the heat wave"
Source: Open English WordNet (CC BY 4.0).