ETYM Latin effectus, from efficere, effectum, to effect; ex + facere to make: cf. French effet, formerly also spelled effect. Related to Fact.
1. A result or consequence.
2. A symptom caused by an illness or a drug.
3. An impression (especially one that is artificial or contrived).
4. The central meaning or theme of a speech or literary work; SYN. essence, burden, core, gist.
5. (Of a law) Having legal validity; SYN. force.
6. Result; ability to produce a result; impression produced on a spectator, auditor etc.