Englishfor English speakers
operation
Noun
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An operation is a medical process, often opening the human body.
The doctors performed the operation in three hours.
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An operation is an action of a group of people working for a goal (often military).
The Army operation was a success.
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An operation is part or all of a business. small(often plural)/small
The company's East Coast operation was bigger than its West Coast operation.
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An operation is a symbol that is used to perform a specific operation (addition, subtraction, multiplication or division) in maths.
The plus symbol is used to perform a specific operation in maths which is addition.
joint
Noun
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A place where two things meet but are still able to move.
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A place where two things join solidly.
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Any part of the body where two bones join, sometimes letting that part of the body to be bent or straightened.
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A way to join two pieces of wood together so that they interlock.
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A bar, restaurant, or nightclub.
It was the kind of joint you wouldn't want your boss to see you in.
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prison; jail.
I'm not breaking any more laws because I don't want to go back to the joint.
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A marijuana cigarette.
Let's smoke a joint and then go skateboarding.
guard
Noun
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A guard is a person or a group of people who watch something and try to stop anything bad from happening to it.
After leaving the police he worked as a security guard at an airport.
The inmate was beaten by a prison guard while other guards watched.
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A guard is something that is a barrier between you and something dangerous.
You push a button and a guard comes down to keep your hands out of the machine while it works.
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A guard is a position on a basketball team who moves the ball to help their team gain points
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A guard is an offensive position in American football who plays either side of the center.
guard
Verb
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If you guard something, you watch it and try to stop anything bad from happening to it.
The front gate was guarded by Iraqi soldiers.