Meaning & use

ruby

noun, adjective·Everyday

Last updated

UK/ˈruːbi/
US/ˈruːbi/

Meanings

  1. nouncountable

    A valuable deep red gemstone, a form of the mineral corundum, used in jewelry.

    Grammar: Can be counted: a ruby, several rubies.

    Patterns

    • a ruby ring
    • set with rubies

    She wore a necklace set with a single large ruby.

    The crown was decorated with rubies and pearls.

    Burmese rubies are among the most prized in the world.

  2. noununcountable

    A deep, bright red color like that of the gemstone.

    Grammar: Uncountable as a color name: the color of ruby.

    Patterns

    • ruby red

    The sunset turned the lake a glowing ruby.

    Her lipstick was a rich shade of ruby.

    The wine shone ruby in the candlelight.

  3. adjectivebefore a noun

    Having a deep, bright red color.

    Grammar: Usually comes before a noun: ruby lips, a ruby sky.

    Patterns

    • ruby red something

    He poured a glass of ruby wine.

    The ruby berries stood out against the snow.

    She painted her nails a ruby shade.

Word forms

pluralrubies

Common combinations

ruby ring
He gave her a gold ruby ring.
ruby red
The grapefruit has ruby red flesh.
ruby anniversary
They celebrated their ruby anniversary with a trip to Italy.
uncut ruby
An uncut ruby looks rough and dull.
flawless ruby
The museum owns a flawless ruby the size of an egg.

Synonyms and how they differ

gem
Gem is a general word for any precious stone, while ruby names one specific red stone.
crimson
Crimson is a color word with a slightly bluish deep red, while ruby adds a shiny, jewel-like glow.
scarlet
Scarlet is a bright, slightly orange red, whereas ruby is darker and richer.

Word family

ruby red adjective
deep red like a ruby
rubicund adjective
literary word for healthily red in the face
rubies noun
the plural of ruby

Commonly confused: ruby or ruby vs. garnet?

ruby vs ruby vs. garnet

Both are red stones, but a ruby is usually a brighter, more valuable red, while a garnet is often darker and brownish.

Practice

The queen's crown was set with a huge red ___.

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