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. trenches, a system of such excavations, with their embankments, etc. a deep furrow, ditch, or cut. Oceanography. a long, steep-sided, narrow depression in the ocean floor.
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What is a trench simple definition?
1a : a long cut in the ground : ditch especially : one used for military defense often with the excavated dirt thrown up in front.
What is trench give an example?
1. The definition of a trench is a long, narrow ditch sometimes dug by troops during wartime to hide from enemies. A long narrow ditch dug in World War I to protect troops from being seen by the enemy is an example of a trench. noun.
What word class is trenches?
1. countable noun. A trench is a long narrow channel that is cut into the ground, for example in order to lay pipes or get rid of water. 2. countable noun [NOUN noun]
What is the definition for trench quizlet?
A block of barbed wire and wooden obstacles to stop any enemy soldier from advancing through the trench system. Trench Block. A break in the barbed wire to allow soldiers out into no man’s land. Wire break. An underground shelter.
What is a trench for carrying water?
Infiltration trenches are gravel-filled and designed to receive stormwater. A trench can take water from a downpipe, overflow from tanks, or from pipes draining hard surfaces such as driveways or paving. Trenches are lined in non- woven geotextile and filled with gravel (such as scoria).
What is a trench used for?
In construction, trenches are dug for foundations of buildings, retaining walls and dams, and for cut-and-cover construction of tunnels. In archaeology, the “trench method” is used for searching and excavating ancient ruins or to dig into strata of sedimented material.
Is a trench a hole?
A trench is a deep and narrow hole, or ditch, in the ground, like the kind soldiers on frontlines might dig to give themselves shelter from the enemy. A natural trench may also be a deep hole on the bottom of the ocean.
Why trenches are formed?
In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.
How do you use trench in a sentence?
His gaze dropped to the trench he had dug around the bush. A trench was dug three and a half feet wide, four feet eight inches deep, and eight feet long. There was blood on his trench coat. He flung away the weapons and the trench coat.
What is the synonym for trench?
noun. ( ˈtrɛntʃ) A ditch dug as a fortification having a parapet of the excavated earth. Antonyms. deglycerolize disarrange divest disorganize disorganise call option undeceive. intrenchment fosse communication trench slit trench moat.
What was life like in the trenches?
Trench life involved long periods of boredom mixed with brief periods of terror. The threat of death kept soldiers constantly on edge, while poor living conditions and a lack of sleep wore away at their health and stamina.
What is a trench in ocean quizlet?
Ocean trenches are deep sections of the ocean where an oceanic plate is usually sinking below a continental plate.
What process causes trenches to form quizlet?
At a converging plate boundary, the denser oceanic plate will undergo subduction at the subduction zone, resulting in a depression aka oceanic trench. The depression maybe formed by the convergence of Two oceanic plates, of which the denser plate go through subduction.
Where are deep sea trenches found quizlet?
What are deep-ocean trenches? Long, narrow creases in the seafloor representing the deepest parts of the ocean floor. Most are located along the margins of the Pacific Ocean, with only two being located in the Atlantic.
Why are trenches full of water?
Much of the land where the trenches were dug was either clay or sand. The water could not pass through the clay and because the sand was on top, the trenches became waterlogged when it rained. The trenches were hard to dig and kept on collapsing in the waterlogged sand.
How many trenches are in the ocean?
Globally, there are over 50 major ocean trenches covering an area of 1.9 million km2 or about 0.5% of the oceans. Trenches are geomorphologically distinct from troughs.
Is trench a drain?
In its simplest form, a trench drain provides an elongated surface for water to drain from a specific area, such as a driveway, beneath an un-guttered roof edge, sidewalk or similar area where water tends to collect. It’s essentially a gutter that is set into the ground.
What are the 4 types of trenches?
- Front-line Trench. This type of trench was also known as the firing-and-attack trench.
- Support Trench. This trench was several hundred yards behind the front-line trench.
- Reserve Trench. The reserve trench was several hundred yards behind the support trench.
- Communication Trench.
What were the different types of trenches?
There were three different types of trenches: firing trenches, lined on the side facing the enemy by steps where defending soldiers would stand to fire machine guns and throw grenades at the advancing offense; communication trenches; and “saps,” shallower positions that extended into no-man’s-land and afforded spots
Where are trenches located?
Trenches are found on the floor of the sea; however, their common name is deep ocean trenches because they are more often found in the deepest areas of the ocean. Trenches are formed in subduction zones where tectonic plates collide.