Definitions of efficient

1. Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.

2. An efficient cause; a prime mover.

3. The person or thing that effects.

4. Efficiency.

5. The agent or cause.

6. That which produces effects; he that makes.

7. Efficiently.

8. Producing or causing desired effects or results; competent.

9. Capable of producing the desired result: effective.

10. Effecting; operative; capable.

11. Acting effectively; competent.

12. Productive of effects; causative.

13. Causing effects; that causes anything to be what it is; effective.