English Dictionary

Define dictionary terms easily in our powerful online English dictionary.

Searching for...

No matching words found

Try a different search term or browse the dictionary

Definition opal in British English

opal noun

[uncountable] noun
/ˈəʊp(ə)l/
1

a smooth stone used in jewellery. Opals look white like milk, but you can see other colours in them as they reflect light.

Synonyms and related words
Definition opal in British English