pocket universe

Noun

A hypothetical realm in inflationary theory, only one of which would contain our observable universe.

Japanese Meaning

インフレーション理論における仮説上の領域で、観測可能な宇宙を含む唯一の局所的な宇宙

The physicist argued that our cosmos might be just one pocket universe among an infinite multiverse.

その物理学者は、私たちの宇宙は無限の多元宇宙の中の一つの小さな独立した宇宙に過ぎないかもしれないと主張した。

Sense（1）

A hypothetical realm in inflationary theory, only one of which would contain our observable universe.

Sense（2）

(gaming) A small, self-contained fictional universe that borrows concepts from established universes.

I set it in a 'pocket universe' based on role-playing games.

pocket universes

（ plural ）