urgently needed; absolutely necessary forming or having the nature of a turning point or crisis
- "the critical test"
- "a critical point in the campaign"
- "foods indispensable to good nutrition"
- "critical medical supplies"
- "a critical element of the plan"
marked by a tendency to find and call attention to errors and flaws
- "a critical attitude"
(chemistry and 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
- "go critical"
- "critical mass"
- "a critical temperature of water is 100 degrees C--its boiling point at standard atmospheric pressure"