Cases of word usage

1) having no interest or opinion; neither for nor against (indifferent)

2) (a kind of) substance like water or oil that flows freely and is neither a solid nor a gas; (especially of solids) now in the form of a liquid (liquid)

3) (of liquids etc) neither very warm nor cold; not eager either in supporting or opposing something (lukewarm)

4) (of gender) neither feminine nor masculine; (of insects, e.g. worker ants) sexually undeveloped; an animal after its sexual organs have been removed; castrate (neuter)

5) supporting neither side in an agreement or quarrel; belonging to a country that supports no side in a war; having no definite characteristics, colour etc (neutral)

6) (used after neither or not) and not; also not (nor)