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.

---

Guelph ² American  

[gwelf] / gwɛlf /

noun

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

---

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

---

Guelph ² British  

/ ɡwɛlf /

noun

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

---

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

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

Such measures are needed to bolster companies that are too uncertain to move ahead with projects, said Jim Jarrell, president of Linamar, an auto-parts and industrial-equipment manufacturer based in Guelph, Ontario.

From The Wall Street Journal • Nov. 7, 2025

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 effort "amps collaboration up to a new level," said Stuart McCook, a historian at the University of Guelph in Ontario who studies coffee and other tropical commodities and who is not involved in Innovea.

From Salon • Jul. 24, 2024

The battlements that surmount this storey are square-shaped Guelph, while those of the great tower which dominates this part of the city are the swallow-tailed Ghibelline.

From Cathedral Cities of Italy by Collins, William Wiehe