(1):
(a.) Not to be borne; unendurable.
(2):
(a.) Not patient; not bearing with composure; intolerant; uneasy; fretful; restless, because of pain, delay, or opposition; eager for change, or for something expected; hasty; passionate; - often followed by at, for, of, and under.
(3):
(a.) Prompted by, or exhibiting, impatience; as, impatient speeches or replies.
(4):
(n.) One who is impatient.