English · Word Candidate

Einstein

/ˈaɪnˌstaɪn/

Proposed by a contributor, not yet supported by evidence.

Also seen as: Einsteins

Sense 1

Meaning · English

An extremely clever or intelligent person.

Noun

Examples

Can you believe he's just a kindergartener? It looks like they've got an Einstein in the family.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 2

Meaning · English

One mole of photons, regardless of frequency, as used to measure irradiance.

NounRegister: dated

Examples

The einstein (symbol E) is an obsolete unit with two conflicting definitions.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 3

Meaning · English

A genius; a very smart person.

NounRegister: informal

Examples

He's a prodigy — they call him their little einstein.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Sense 4

Meaning · English

A shape that can be repeated to cover a plane with a nonrepeating pattern.

Noun

Examples

In less poetic terms, an einstein is an “aperiodic monotile,” a shape that tiles a plane, or an infinite two-dimensional flat surface, but only in a nonrepeating pattern. (The term “einstein” comes from the German “ein stein,” or “one stone” — more loosely, “one tile” or “one shape.”)

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Common questions

What does “Einstein” mean?

An extremely clever or intelligent person.

Is “Einstein” formal or informal?

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

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