Standard Lemma guide

Y2K

adj · noun · 6 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

adj

Meaning 1

Pertaining to the Y2K aesthetic.

Definition source: English Wiktionary via Wiktextract

Qualifier: aesthetic

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Abbreviation of year 2000.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, alt-of, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Millennium bug.

Definition source: English Wiktionary via Wiktextract

Usage: metonymically, uncountable

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Millennium bug.

The Y2K scare.

Definition source: English Wiktionary via Wiktextract

Usage: broadly, metonymically, uncountable

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

Alternative form of Y2K.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

the year 2000 in the Gregorian calendar

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: year, twelvemonth, yr

History

Etymology

Abbreviated from "year 2000", with "K" standing for 1000, as in the prefix kilo- though capital K as a prefix is often used as ×1024 instead of ×1000. The correct S.I. Prefix for ×1000 is lowercase k.