1. very small holes made by or as if made by a pin

Examples

• The fabric had several pinholes from where it was pinned to the pattern.
• Light leaked through pinholes in the blackout curtains.
• The photographer used pinholes in cardboard to create a camera obscura.
• Tiny pinholes in the metal sheet allowed air to circulate.
• She noticed pinholes in the balloon before it deflated.
• The old photograph had pinholes in the corners from being displayed.
• Pinholes in the aluminum foil let steam escape during cooking.