1.
time-saving; shortening of time
Reducing the time needed for a task or activity. Short for 時間短縮. Very commonly used in everyday life, especially about cooking, housework, and work tasks.
2.
shortened business hours
Reduced operating hours, especially of restaurants and shops. Became extremely common during COVID-19 when businesses were asked to close early.
Abbreviation of 時間短縮. Can function as a noun modifier: 時短レシピ (quick recipe), 時短テク (time-saving technique), 時短グッズ (time-saving goods). Also used with する: 時短する (to save time). The sense of 'shortened business hours' became widespread during the COVID-19 pandemic, often appearing in 時短営業 (reduced-hours operation) and 時短要請 (request to shorten hours).