- in (of a ball; in tennis, etc.); inside the line
This meaning is used to indicate that a ball is within the boundaries of the playing area, such as in sports like tennis.
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The ball is in the line.
- in; inside; internal; interior
This meaning refers to something being located within something else or pertaining to the inside part of an object or place.
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The inside of the room is very quiet.
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There are toys inside the box.
- enter here; enter; entrance; (parking) entry
This meaning describes a point of access to a place, often denoting where someone can go in or where vehicles can enter.
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The entrance to the parking lot is over there.
- back nine (golf)
This meaning is specific to golf, referring to the last nine holes of an 18-hole golf course.
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I played the back nine today.
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I got a good score on the back nine.
- inside lane (track cycling, speed skating, etc.)
This meaning relates to racing and sports, indicating the lane that is closest to the center of the track, often associated with advantage in speed events.
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It is important to take the inside lane.
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He started the race in the inside lane.
- check-in time
This meaning indicates the designated time at which one must arrive to register or check into a place, such as a hotel or flight.
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The check-in time is 3 PM.
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I recommend checking in early.