All 13 Uses

principal
in
The Adventures of Captain Underpants
(Edited)

That's Mr. Krupp, the principal.
p. 17.9 *

principal = the person in charge of the school
Now, Mr. Krupp was the meanest, sourest old principal in the whole history of Jerome Horwitz Elementary School.
p. 18.1

principal = most important; or person that is most important
And how some huge pranks (and a little blackmail) turned their principal into the coolest superhero of all time.
p. 21.6
George Beard and Harold Hutchins, please report to Principal Krupp's office at once.
p. 29.5
George and Harold entered Principal Krupp's office and sat down on the chairs in front of his desk.
p. 30.1
"Aw, that's too bad," said Principal Krupp.
p. 31.1
"I thought you'd never ask," laughed Principal Krupp.
p. 35.9
"Anything?" asked Principal Krupp with delight.
p. 37.6
"Call it what you like," Principal Krupp snapped, "but if you two don't follow that list exactly, then this tape becomes the property of the Horwitz Knuckleheads!"
p. 38.5
George held up his hand and showed the ring to Principal Krupp.
p. 48.5
The boys looked up at their principal, who had been standing behind them in a trance all morning.
p. 52.5
Principal Krupp took the videotape out of his file cabinet.
p. 115.1
Principal Krupp turned back into ….
p. 119.7

Definitions:

(1) (principal)
most important; or person who is most important
The exact meaning of principal can depend upon its context. For example:
- "the principal idea" or "the principal performer" -- the most important
- "the principal of the school" -- the person in charge
- "a principal of a company" -- an owner or person with controlling authority
- "the principal in a transaction" (as contrasted to the agent) -- the person on whose behalf an agent acts
(2) (meaning too rare to warrant focus)
See a comprehensive dictionary for specialized senses in finance, architecture, law, chemistry, and music.