1. a small hill or the side of a hill; a hillock.
Usage: chiefly North American; often used in place names, especially in the Great Plains and Canada

Examples

• The coteau rose gently above the prairie.
• Settlers built their homesteads on the coteaus to avoid flooding.
• The landscape was dotted with small coteaus and ravines.
• From the top of the coteau, we could see for miles across the plains.
• The region is known for its rolling coteaus and grasslands.