■ adjective
1》 expressing adverse or disapproving comments or judgements.
2》 expressing or involving an analysis of the merits and faults of a work of literature or art.
3》 (of a situation or problem) at a point of crisis.
↘extremely ill and at risk of death.
↘having a decisive importance in the success or failure of something.
4》 Mathematics & Physics relating to or denoting a point of transition from one state to another.
5》 (of a nuclear reactor or fuel) maintaining a self-sustaining chain reaction.
Derivatives
~ity noun
~ly adverb
~ness noun