1Lack of power; impotence; an instance of this.
2rare Something which is not a power; something (in later use especially a state) which lacks power.
(attributive). That is not concerned with power; especially that does not use or involve electrical (nuclear, etc.) power.
Late Middle English; earliest use found in John Trevisa (c1342–?1402), translator. From non- + power, originally after Anglo-Norman nounpower, Old French nonpooir.