The quality of being antireal.

(particle physics) One of the three possible colours of an antiquark, corresponding to red in a quark.

(philosophy) Any position involving denial of the objective reality of certain entities, or denial that certain general statements are objectively either true or false.

Lacking or (especially) opposed to reason and rational thought.

plural of antirealism

Opposing or countering reality.

Opposing a rally.

Opposing rationing.

(US, historical) Opposing the collection of outstanding rents in upstate New York during the early 19th century after the death of Stephen Van Rensselaer III.