A mortise is a square or rectangular hole cut into a piece of wood so another part, called a tenon, can fit tightly into it. Together, the mortise and tenon lock two pieces together like a strong, hidden puzzle joint.
People most often talk about a mortise when they’re building furniture, doors, or cabinets. A carpenter might say, “I need to chisel the mortise deeper so the rail sits flush,” or a DIYer shopping for hardware might ask for a “mortise lock” that slides into a pocket inside the door’s edge. Even hobby woodworkers on YouTube show how to cut a mortise with a drill and chisel to make a sturdy coffee table.
Meaning & Usage Examples
• “Mortise” = the hole or pocket.
• Example: “Cut a ½-inch deep mortise in the leg so the shelf support can slot in.”
Context / Common Use
You’ll hear the word in carpentry shops, home-center aisles (mortise locks, mortise hinges), and woodworking videos. If someone says “mortise and tenon joint,” they just mean a classic, super-strong way to connect wood without nails.
Is a mortise the same as a drill hole?
No. A mortise is a shaped, usually square or rectangular, slot made to fit a matching tenon, not just a round hole.
Can I cut a mortise without fancy tools?
Yes. A sharp chisel, a drill, and careful measuring are enough for small projects.
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