English · Idiom Historical

to retire into one's shell

Preserved but no longer current.

Meaning · English

To become reticent and uncommunicative, to withdraw oneself from society in a forbidding way. The allusion is to the tortoise, which, once it has "got into its shell," is quite unget-at-able.

Era: ca. 1898 (Victorian)

Sources & notes

Reproduced from Brewer’s Dictionary of Phrase and Fable (1898 edition, public domain; archive.org, retrieved 2026-07-31; OCR text, minor errors possible). Reflects the scholarship and attitudes of its era.

Topics: Historical slang (1800s)

Common questions

What does “to retire into one's shell” mean?

To become reticent and uncommunicative, to withdraw oneself from society in a forbidding way. The allusion is to the tortoise, which, once it has "got into its shell," is quite unget-at-able.

Is “to retire into one's shell” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.

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