(1):

(a.) Done with hold design, rash confidence, or in violation of known duty; willful.

(2):

(a.) Full of presumption; presuming; overconfident or venturesome; audacious; rash; taking liberties unduly; arrogant; insolent; as, a presumptuous commander; presumptuous conduct.

(3):

(a.) Founded on presumption; as, a presumptuous idea.