English word origin

Etymology of 420

So named because it is 420 centimetres long.

3 source sectionsExtended source reportWiktionary original ↗

In this entry · 3 source sections

The source etymologies

Wiktionary via Kaikki / Wiktextract

The source reports below are imported and unreviewed by *SET-U. Separate numbered origins and differing source variants are preserved; agreement within this extraction is not independent corroboration.

Source etymology 1

Original entry ↗

noun

A particular type of monohull dinghy with two sails, designed for two people.

Selected source glosses provide context, not a complete modern definition inventory

So named because it is 420 centimetres long.

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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Source etymology 2

Original entry ↗

noun

Cannabis. · Pertaining to cannabis, its consumption, or cannabis culture. · April 20 (abbreviated 4/20 in the US), as an occasion to celebrate cannabis culture.

Selected source glosses provide context, not a complete modern definition inventory

Likely influenced by the time (4:20 pm) a particular group would meet in search of marijuana, circa 1971; subsequently spread as a cipher through the San Francisco Bay area and adopted among Grateful Dead fans.

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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Source etymology 3

Original entry ↗

noun

fraudster, cheater, forger; a smooth operator

Selected source glosses provide context, not a complete modern definition inventory

From section 420 of the Indian Penal Code (and its corresponding versions in modern Pakistan and Bangladesh), which criminalizes cheating.

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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Where this record stops

This page does not supply an independently verified sound-change sequence, first-use manuscript or complete family tree unless a cited analysis explicitly establishes one. Missing detail here is a limit of this record—not a claim that humanity knows nothing more.

An older meaning does not determine what a word must mean today. Follow the sources, preserve disagreements, and keep ancestry separate from interpretation.

Contribute located evidence for 420 →

Source and snapshot

Imported from Wiktionary contributors; extracted by Tatu Ylonen / Wiktextract / Kaikki.org. Selected fields are reformatted and grouped; wording, source identity and etymology sections are retained. CC-BY-SA-4.0 applies to the imported source material.

Dump: 2026-10-01 · Extracted: 2026-10-30. These are snapshot dates, not the word’s first attestation or the page’s revision date.

Source entry and bibliography ↗Wiktionary revision history ↗Acquisition and rights ledger

Machine-source provenance

Source SHA-256: 5ff2c072f8099f2d2ce484bd6957bf179f046d2ad37bc36555edf8bb84cb5291
Import run: 73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID: w-NDIw