Definition of topaz
1a : a mineral that is essentially a silicate of aluminum and usually occurs in orthorhombic translucent or transparent crystals or in white translucent massesb : a usually yellow to brownish-yellow transparent mineral topaz used as a gemc : a yellow sapphired : a yellow quartz
2 : either of two large brilliantly colored South American hummingbirds (Topaza pella and T. pyra)
Recent Examples of topaz from the Web
TOPAZ is an acronym for Thermionic Experiment with Conversion in Active Zone.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'topaz.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of topaz
Middle English topace, from Anglo-French, from Latin topazus, from Greek topazos
First Known Use: 13th centurySee Words from the same year
TOPAZ Defined for English Language Learners
Definition of topaz for English Language Learners
: a clear yellow to brownish-yellow stone that is used as a jewel
TOPAZ Defined for Kids
Definition of topaz for Students
: a clear yellow crystal that is used as a gem
Seen and Heard
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