1. a person who lived in a cave, especially in prehistoric times
Usage: historical
2. a person who is regarded as being deliberately ignorant or old-fashioned
Usage: informal; often derogatory

Examples

• Archaeologists discovered cave paintings created by ancient troglodytes.
• The troglodytes of the Stone Age used simple tools made from stone and bone.
• He’s such a troglodyte when it comes to technology – he still refuses to use a smartphone.
• Don’t be a troglodyte; embrace the changes in the workplace.
• The museum exhibit showed how troglodytes lived thousands of years ago.
• She called him a troglodyte for his outdated views on social issues.