Plural of “halo”

The plural of halo is halos (some dictionaries also accept haloes).

Why

"Halo" comes from Greek "halos," originally a threshing floor, later the disk of light around the sun or moon, and eventually the ring of light depicted around the heads of saints and angels in religious art. It entered English in the 16th century, early enough to plausibly follow the older -oes pattern, yet modern usage has settled firmly on the shorter "halos" as the dominant spelling.

"Haloes" is still listed in dictionaries and does appear, particularly in older religious and literary writing, but "halos" has become the clearly dominant form in contemporary usage across both the literal astronomical sense (a halo around the moon) and the figurative sense of a glow of approval or virtue. Byzantine and medieval Christian art standardized the golden circular halo as a visual marker of sainthood centuries before the English word itself was borrowed, meaning the artistic convention actually predates the English vocabulary now used to describe it by well over a thousand years.

Usage note

"Halos" is the safer, more contemporary choice in nearly all writing today. "Haloes" isn't wrong, but it will read as somewhat old-fashioned to most modern readers.

The word's original Greek sense, a circular threshing floor where oxen trod in a ring to separate grain, is a genuinely surprising ancestor for a word now associated almost entirely with sacred imagery and soft celestial light, connected only by the shared idea of a circular shape traced around a central point. Popular culture has also extended "halo" into the enormously successful video game franchise of the same name, a proper noun use entirely unrelated to the astronomical or religious senses, showing how a single old word can spawn a completely new branch of meaning through branding alone. Aviation and astronomy both use "halo orbit," a specific technical term for a stable gravitational path around a point in space, an entirely unrelated modern coinage that borrows the word's general sense of a ring-shaped pattern.

Common real mistakes

There's little live confusion here since "halos" has become so dominant, but writers producing deliberately archaic or religious-themed prose sometimes reach for "haloes" specifically for its older, more formal feel — a stylistic choice rather than a correction. Writers should also avoid confusing the astronomical "halo" (a ring of light caused by ice-crystal refraction) with a "corona," a related but visually and scientifically distinct atmospheric optical phenomenon.

The wider pattern

"Halo" shows the opposite trajectory from "cargo": rather than settling into a stable -oes plural or splitting between two live options, it has moved almost entirely away from its older -oes form toward the simpler "halos," much like "zero" has increasingly favored "zeros" over "zeroes" in recent decades.

Examples

• A faint halo surrounded the moon that night.
• The painting depicted three saints, each with a golden halo.
• Ice crystals in the atmosphere can create halos around the sun.
• She wore a headband designed to look like a halo for the costume party.
• Halos appeared around the streetlights in the fog.
• The stained glass windows showed angels with delicate halos.
• Weather forecasters noted the rare double halos around the sun.
• The statue's halos were carved from pale marble.
• Fans joked that the celebrity had lost her halo after the scandal.
• Photographers waited for the rare lunar halos to appear.
• Photographers raced to capture the twin halos before they faded.
• The illustrator added soft halos around each of the angels.
• The telescope image revealed faint halos around distant stars.
• Fog gave the streetlamps a soft halo effect.
• The exhibit compared halos in Renaissance and Byzantine art.
• The artist sketched delicate halos around each figure.
• The planetarium show explained how lunar halos form.
• A pale halo lingered around the moon all night.