tem·per·a·ment (tĕmprə-mənt, tĕmpər-ə-)
a. The manner of thinking, behaving, or reacting characteristic of a specific person: a nervous temperament. See Synonyms at disposition.
b. The distinguishing mental and physical characteristics of a human according to medieval physiology, resulting from dominance of one of the four humors.
2. Excessive irritability or sensitiveness: an actor with too much temperament.
3. Music See equal temperament.
[Middle English, from Latin temperāmentum, from temperāre, to temper; see TEMPER.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.