The commanding officer of a military organization.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "commandant" in a sentence
"Obviously the commandant is concerned with the good of the service."
"The French term commandant answers to an English major, and he will therefore in future be termed Major Tempe."
"Gary DuMornay, the principal of Kappa 6 - who is known as the "commandant" at this military-style middle school - said that the grant money would mainly be used to improve the students' reading ability."