in (ball in play); inside the line
Sports term for a ball landing inside the boundary line, especially in tennis. Opposite of アウト.
See also: アウト
His serve just barely landed in.
That shot was in.
Used on signs, especially parking entrance signs, to indicate where to enter. Often seen as イン.
駐車場の入り口に「イン」と書いてある。
The parking lot entrance says 'IN'.
back nine
Golf term for the second half of an 18-hole course. Opposite of アウト.
See also: アウト
今日はインでスコアを伸ばした。
I improved my score on the back nine today.
inside lane
In track cycling, speed skating, etc., the lane closest to the inside of the track.
インを走る選手が有利だ。
The athlete running on the inside lane has an advantage.
check-in time
Abbreviation of チェックイン. Used in contexts like hotel or flight check-in times.
See also: チェックイン
ホテルのインは午後3時からです。
Hotel check-in is from 3 p.m.
She won the race running in the inside lane.
He was two over par on the back nine.
This hotel checks you in at 3 p.m. and out at 11 a.m.
イン is a casual, shortened way to say check-in time, while チェックイン is the fuller, more explicit term used in formal contexts like hotel or airport signage.
Standard katakana spelling for this loanword. It is usually written in kana.
Fullwidth Latin-letter spelling; occasionally seen in signs or stylized text, but uncommon in normal writing.
Borrowed from English 'in'. No explicit language of origin information is specified, but the word is clearly a loanword.