The Collaborative International Dictionary of English v.0.48:
nonpartisan \nonpartisan\ adj. 1. free from party affiliation or bias. Opposite of partisan. [Narrower terms: bipartisan, bipartizan, two-party, two-way; {independent ] [Narrower terms: {nonparty, non-party ] Syn: nonpartizan. [WordNet 1.5] 2. not affiliated with any one party; as, a nonpartisan commission to study crime. [WordNet 1.5]