1. a prickly plant with purple, pink, or white flowers, typically found in fields and waste areas

Examples

• The field was overgrown with thistles and weeds.
• She carefully avoided the sharp thistle spines while walking through the meadow.
• The thistle is the national flower of Scotland.
• Goldfinches love to eat thistle seeds.
• The farmer worked to remove thistles from his pasture.
• Purple thistle flowers bloomed along the roadside.