lo·​gy | \ ˈlō-gē How to pronounce logy (audio) \
variants: or less commonly loggy \ ˈlȯ-​gē How to pronounce logy (audio) , ˈlä-​ \
logier; logiest

Definition of logy

 (Entry 1 of 2)

Definition of -logy (Entry 2 of 2)

1 : oral or written expression phraseology
2 : doctrine : theory : science ethnology

Did you know?

Based on surface resemblance, you might guess that logy (also sometimes spelled loggy) is related to groggy, but that's not the case. Groggy ultimately comes from "Old Grog," the nickname of an English admiral who was notorious for his cloak made of a fabric called grogram—and for adding water to his crew's rum. The sailors called the rum mixture grog after the admiral. Because of the effect of grog, groggy came to mean "weak and unsteady on the feet or in action." No one is really sure about the origin of logy, but experts speculate that it comes from the Dutch word log, meaning "heavy."

Examples of logy in a Sentence

Adjective the next morning I was feeling logy, having stayed up half the night

First Known Use of logy


1847, in the meaning defined above

History and Etymology for logy


perhaps from Dutch log heavy; akin to Middle Low German luggich lazy

Noun combining form

French -logie, from Latin -logia, from Greek, from logos word

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logwood printing black



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Cite this Entry

“Logy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/logy. Accessed 6 Jul. 2022.

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More Definitions for logy


noun suffix

Kids Definition of -logy

: area of knowledge : science biology


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