1. without glass; not made of or containing glass
2. not wearing glasses or spectacles

Examples

• The glassless frame held the photograph in place without any protective covering.
• She preferred a glassless design for her picture frames to reduce glare.
• He appeared glassless for the first time after getting contact lenses.
• The museum displayed the artifact in a glassless case for close inspection.
• Modern glassless windows use alternative transparent materials.
• The glassless portrait frame gave the artwork a minimalist look.