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A position on a basketball team
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The duty of serving as a sentry
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(American football) a position on the line of scrimmage
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A precautionary measure warding off impending danger or damage or injury etc.
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A device designed to prevent injury or accidents
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A posture of defence in boxing or fencing
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A military unit serving to protect some place or person
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The person who plays that position on a football team
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A person who keeps watch over something or someone
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The person who plays the position of guard on a basketball team
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Watch over or shield from danger or harm; protect
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Protect against a challenge or attack
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To keep watch over
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Take precautions in order to avoid some unwanted consequence