noun
(countable) A clear deep blue variety of corundum, valued as a precious stone.
(countable and uncountable) A white, yellow, or purple variety of corundum, either clear or translucent.
(countable and uncountable) A deep blue colour.
(heraldry) Azure, when blazoning by precious stones.
(countable) Any hummingbird in the genera Hylocharis and Chlorestes, as well as the rufous-throated sapphire, which is now in the genus Amazilia.
Any of the butterflies in the southern Asian lycaenid genus Heliophorus or the African lycaenid genus Iolaus.
adjective
of a deep blue colour.
pertaining to a 45th year