Guelph

¹ American  

[gwelf] / gwɛlf /

Or Guelf

noun

1. a member of the political party in medieval Italy and Germany that supported the sovereignty of the papacy against the German emperors: opposed to the Ghibellines.

2. a member of a secret society in Italy in the early 19th century that opposed foreign rulers and reactionary ideas.

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Guelph ² American  

[gwelf] / gwɛlf /

noun

1. a city in SE Ontario, in S Canada.

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Guelph ¹ British  

/ ɡwɛlf /

noun

1. a member of the political faction in medieval Italy that supported the power of the pope against the German emperors Compare Ghibelline

2. a member of a secret society in 19th-century Italy opposed to foreign rule

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Guelph ² British  

/ ɡwɛlf /

noun

1. a city in Canada, in SE Ontario. Pop: 106 920 (2001)

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Other Word Forms

• Guelfic
  adjective
• Guelfism
  noun
• Guelphic
  adjective
• Guelphism
  noun

Etymology

Origin of Guelph

1570–80; < Italian Guelfo < Middle High German Welf name of founder of a princely German family

Example Sentences

For 21-year-old Vedant Vyas, this meant taking an indefinite leave from the University of Guelph in Ontario, Canada, last April so he could work full-time on his AI startup, Opennote.

From The Wall Street Journal • Mar. 22, 2026

Avocados may also help people manage obesity and even prevent diabetes, according to researchers at the University of Guelph, near Toronto.

From MarketWatch • Feb. 7, 2026

Michael von Massow, a professor of agriculture at Guelph University, said fruit juice prices have risen 7.5% from last year due to counter measures on American citrus.

From BBC • Aug. 1, 2025

The senior author is Professor Tami A. Martino, PhD, distinguished chair in molecular and cardiovascular research at the University of Guelph in Ontario, Canada.

From Science Daily • Mar. 14, 2024

Whilst in North Germany the catastrophe so disastrous to the House of Guelph was completed, in Vienna everything was expected from the battle which all foresaw must take place in Bohemia almost immediately.

From For Sceptre and Crown, Vol. II (of II) A Romance of the Present Time by Meding, Johann Ferdinand Martin Oskar