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Definition of welsh onion

welsh onion

Plural:Welsh onions
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• noun

1

A perennial species of onion (Allium fistulosum) native to Asia that develops tall, hollow green stalks but does not form a significant underground bulb, widely cultivated for culinary use.

Example

"The chef finely chopped the fresh Welsh onion to use as a garnish for the miso soup."

Synonyms
View all synonyms for welsh onion

Word Nuance & Usage

Despite the name, the Welsh onion does not originate from Wales; the word 'Welsh' here retains its archaic meaning of 'foreign'. It is frequently used interchangeably with 'scallion' or 'green onion' in culinary contexts, though botanically it refers specifically to the non-bulbing species Allium fistulosum.

• Nearby Words

wels
wels catfish
welsh
welsh onion
welsh rarebit
welt
welterweight

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Welsh onion. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/welsh-onion
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