1. old-fashioned irons that were heated on a stove or fire and used to press clothes
Usage: historical; plural form
2. triangular rock formations that resemble the shape of old pressing irons
Usage: geological; often capitalized when referring to specific formations

Examples

• The museum displayed a collection of antique flatirons from the 1800s.
• Before electric irons, people used flatirons heated on wood stoves.
• The Flatirons near Boulder, Colorado are famous rock formations.
• Hikers enjoy the scenic views of the flatirons jutting up from the landscape.
• She inherited her grandmother’s set of cast iron flatirons.
• The distinctive flatirons create a dramatic backdrop for the city.