verb, bored, bor⋅ing, noun | 1. | to pierce (a solid substance) with some rotary cutting instrument. |
| 2. | to make (a hole) by drilling with such an instrument. |
| 3. | to form, make, or construct (a tunnel, mine, well, passage, etc.) by hollowing out, cutting through, or removing a core of material: to bore a tunnel through the Alps; to bore an oil well 3000 feet deep. |
| 4. | Machinery. to enlarge (a hole) to a precise diameter with a cutting tool within the hole, by rotating either the tool or the work. |
| 5. | to force (an opening), as through a crowd, by persistent forward thrusting (usually fol. by through or into); to force or make (a passage). |
| 6. | to make a hole in a solid substance with a rotary cutting instrument. |
| 7. | Machinery. to enlarge a hole to a precise diameter. |
| 8. | (of a substance) to admit of being bored: Certain types of steel do not bore well. |
| 9. | a hole made or enlarged by boring. |
| 10. | the inside diameter of a hole, tube, or hollow cylindrical object or device, such as a bushing or bearing, engine cylinder, or barrel of a gun. |

bore (bôr) Pronunciation Key
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