critical (Adjective) — Marked by a tendency to find and call attention to errors and flaws. ex. "a critical attitude"
critical (Adjective) — (physics) at or of a point at which a property or phenomenon suffers an abrupt change especially having enough mass to sustain a chain reaction. ex. "a critical temperature of water is 100 degrees C--its boiling point at standard atmospheric pressure" ex. "critical mass" ex. "go critical"
critical (Adjective) — Characterized by careful evaluation and judgment. ex. "a critical reading" ex. "a critical dissertation" ex. "a critical analysis of Melville's writings"
critical (Adjective) — Urgently needed; absolutely necessary. ex. "a critical element of the plan" ex. "critical medical supplies"
critical (Adjective) — Forming or having the nature of a turning point or crisis. ex. "a critical point in the campaign" ex. "the critical test"
critical (Adjective) — Being in or verging on a state of crisis or emergency. ex. "a critical shortage of food" ex. "a critical illness" ex. "an illness at the critical stage"
critical (Adjective) — Of or involving or characteristic of critics or criticism. ex. "critical acclaim"