一斉

• 読み: いっせい
• ローマ字: issei
• 漢字の分解: 一 (ichi/is) — one; 斉 (sei) — even, equal, together
• 発音: /is.seː/

意味

Simultaneous; all at once; in concert. Describes many things happening at the same time.

A noun and adverb describing multiple entities acting or occurring simultaneously. Used both as a noun modifier (一斉検査, simultaneous inspection) and adverbially with に (一斉に立ち上がる, to stand up all at once). Common in news, instructions, and descriptions of group actions.

例文

1. 信号が変わると車が一斉に動き出した。
2. 一斉テストの結果が来週発表される。
3. 桜の花が一斉に咲き始めた。

使い方ガイド

場面: group actions, news, instructions, events

トーン: neutral

起源と歴史

From Sino-Japanese 一 (ichi/is, one) + 斉 (sei, even/equal/together). Literally 'together as one' — all aligned and acting at the same moment.

文化的背景

時代: Modern

世代: All ages

社会的背景: Universal