acute (Adjective) — (medicine) having or experiencing a rapid onset and short but severe course. ex. "acute appendicitis" ex. "the acute phase of the illness" ex. "acute patients"
acute (Adjective) — Extremely sharp or strongly felt. ex. "acute pain" ex. "felt acute annoyance"
acute (Adjective) — Having or demonstrating ability to recognize or draw fine distinctions. ex. "an acute observer of politics and politicians"
acute (Adjective) — Of an angle; less than 90 degrees.
acute (Adjective) — Ending in a piercing point; pointed.
acute (Adjective) — Of critical importance and consequence. ex. "an acute (or critical) lack of research funds"
acute (Noun) — A mark (') placed above a vowel to indicate pronunciation.