1. small telescopes used for viewing distant objects, especially handheld ones used for observation or surveillance
Usage: plural of spyglass; often associated with nautical or military use

Examples

• The ship’s captain kept several spyglasses on the bridge for spotting other vessels.
• Pirates in old movies are often shown using spyglasses to scan the horizon.
• The antique shop displayed a collection of brass spyglasses from the 18th century.
• Birdwatchers sometimes prefer compact spyglasses over larger binoculars.
• The detective used one of his spyglasses to observe the suspect from across the street.
• Maritime museums often feature exhibits of historical spyglasses and navigation instruments.