noun
best time; personal record
Commonly used in sports and racing to refer to one's fastest recorded time; similar to 'personal best' in English.
今日のレースでベストタイムを更新した。
I set a new personal best in today's race.
彼のベストタイムは10秒台だ。
His best time is in the 10-second range.
Spelling with interpunct, sometimes seen in dictionaries or formal contexts.
More explicitly means 'personal best', often used interchangeably with ベストタイム in sports contexts.
Loanword from English 'best time', used in Japanese primarily in sports and racing contexts.