,| 1. | Fortification. a long, narrow excavation in the ground, the earth from which is thrown up in front to serve as a shelter from enemy fire or attack. |
| 2. | trenches, a system of such excavations, with their embankments, etc. |
| 3. | a deep furrow, ditch, or cut. |
| 4. | Oceanography. a long, steep-sided, narrow depression in the ocean floor. |
| 5. | to surround or fortify with trenches; entrench. |
| 6. | to cut a trench in. |
| 7. | to set or place in a trench. |
| 8. | to form (a furrow, ditch, etc.) by cutting into or through something. |
| 9. | to make a cut in; cut into; carve. |
| 10. | to dig a trench. |
| 11. | trench on or upon,
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| trench (trěnch) Pronunciation Key
A long, steep-sided valley on the ocean floor. Trenches form when one tectonic plate slides beneath another plate at a subduction zone. The Marianas Trench, located in the western Pacific east of the Philippines, is the deepest known trench (10,924 m or 35,831 ft) and the deepest area in the ocean. |