Dictionary and Thesaurus

Definition of Mercurial

• (a.) Having the qualities fabled to belong to the god Mercury; swift; active; sprightly; fickle; volatile; changeable; as, a mercurial youth; a mercurial temperament.
• (a.) Having the form or image of Mercury; -- applied to ancient guideposts.
• (a.) Of or pertaining to Mercury as the god of trade; hence, money-making; crafty.
• (a.) Of or pertaining to, or containing, mercury; as, mercurial preparations, barometer. See Mercury, 2.
• (a.) Caused by the use of mercury; as, mercurial sore mouth.
• (n.) A person having mercurial qualities.
• (n.) A preparation containing mercury.

Synonyms of Mercurial

• Erratic
• Fickle
• Quicksilver
• Mercurial
• Mercurial

Antonyms of Mercurial

Homophones of Mercurial