Foe Definition

fō

foes

noun

foes

A personal enemy or opponent.

American Heritage

One who is opposed to an idea or cause.

A foe of tax reform.

American Heritage

Enemy (in all senses)

Webster's New World

Something that is destructive or injurious.

Taxes that were the foe of economic development.

American Heritage

A unit of energy equal to 10⁴⁴ joules.

Wiktionary

Synonyms:

Antonyms:

abbreviation

Fraternal Order of Eagles.

Webster's New World

Friends of the Earth.

Wiktionary

Fraternal Order of Eagles.

Wiktionary

adjective

(obsolete) Hostile.

Wiktionary

Other Word Forms of Foe

Singular:

foe

Plural:

foes

Middle English fo 'foe; hostile', from earlier ifo 'foe', from Old English ġefāh 'enemy', from fāh 'hostile', from Proto-Germanic *faihaz (cf. Old Frisian fāch 'punishable', Middle High German gevēch 'feuder'), from Proto-Indo-European *peik/k̑- 'to hate, be hostile' (cf. Middle Irish oech 'enemy, fiend', Latin piget 'he is annoying', Lithuanian piktas ‘evil’, Albanian pis ‘dirty, scoundrel’).

From Wiktionary
Middle English fo from Old English gefā from fāh hostile

From American Heritage Dictionary of the English Language, 5th Edition
An acronym of fifty-one ergs

From Wiktionary