それじゃあ

それじゃあ
conjunction / interjection
well then; in that case; see you
1. well then; in that case
An informal conjunction used to transition to a new topic or action based on what was just said. A casual form of それでは.
それじゃあ、(はじ)めよう。
Well then, let's begin.
(あめ)なの?それじゃあ(くるま)()こう。
It's raining? In that case, let's go by car.
それじゃあ、明日(あした)会議(かいぎ)中止(ちゅうし)ということで。
Well then, the meeting tomorrow is cancelled.
2. well then; see you; goodbye
Used as a casual way to signal departure or end a conversation. Short for それではまた.
それじゃあ、また明日(あした)
Well then, see you tomorrow.
もう(おそ)いから、それじゃあね。
It's late, so bye then.
それじゃあ、お(さき)失礼(しつれい)します。
Well then, I'll excuse myself first.

USAGE:
An informal variant of それでは. Can be further shortened to それじゃ or じゃあ in very casual speech. The formality scale runs: それでは (formal) > それじゃあ (informal) > じゃあ (very casual). Commonly heard at the start or end of conversations.

FORMALITY VARIANTS:

  • それでは (formal/polite)
  • それじゃあ / それじゃ (casual)
  • じゃあ / じゃ (very casual)

SIMILAR WORDS:

  • それでは: well then — the more formal equivalent
  • じゃあ: well then — an even more casual abbreviation
  • では: well then — formal, often written