定时

• 拼音: dìng shí
• 汉字拆解: 定 = 宀 (roof) + 正 (correct) — to settle; 时 = 日 (sun) + 寸 (inch) — time, measured by the sun's movement

含义

Timed; scheduled; to set a time. Can describe something that operates at a fixed time or the action of setting a timer.

Common in both technical and everyday contexts. Used for timers on appliances (定时器), scheduled tasks, and regular routines. 定时炸弹 (time bomb) is a well-known compound. As a verb-object structure, 定好时间 means to fix a time.

例句

1. 我把空调设成定时关机，睡着以后自动就停了。
2. 这个咖啡机有定时功能，早上七点自动开始煮咖啡。
3. 医生建议老年人定时测量血压，及时发现问题。

用法指南

语境: technology, everyday, health

语气: practical

正确说法

• 洗衣机可以定时启动，很方便。(The washing machine can be set to start on a timer, very convenient.)
• 我们定时开会，每周三下午两点。(We have regularly scheduled meetings, every Wednesday at 2 PM.)

错误说法

• 把定时和准时混淆 (定时 means scheduled/timed, while 准时 means punctual/on time — different concepts)

起源与历史

Compound of 定 (to fix, to set) + 时 (time). A practical term that arose with the development of timed mechanical and electronic devices.

文化背景

世代: All ages

社会背景: Universal