1. having no wings or having wings that are too small or underdeveloped to be used for flight

Examples

• Penguins are wingless birds that swim instead of fly.
• The wingless insect crawled across the forest floor.
• Some species of beetles are completely wingless.
• The wingless aircraft model was used for ground testing.
• Ostriches are wingless when it comes to actual flight ability.
• The museum displayed a wingless butterfly specimen.