verb
ream
To enlarge or smooth a hole with a rotating tool.
The machinist reams the hole so the bolt fits snugly.
Etymology
The older verb means to widen or make room. The machining sense specializes that action to enlarging or smoothing a hole with a cutting tool.
More examples
- Ream the opening slightly wider before inserting the pin.
- She reamed the drilled holes to a uniform diameter.
- This rotating cutter reams the hole to a smooth finish.
Forms
ream · reams · reamed · reaming
reamer noun — A rotating tool for enlarging or smoothing holes.