(slang) The situation in which one is viewed by a potential partner as a platonic friend, which complicates the initiation of a romantic relationship.

(slang, transitive) To classify as a friend, without any possibility of a romantic relationship.

Alternative spelling of dropzone / relegation zone

plural of zone defense

(mycology) A ring of fibers on the stem of a mushroom that is not well enough defined to be called an annulus.

(geology) A deep level seismic zone on the line of subduction. This zone can be as deep as 700km.

(physics) The stage in the flow or a fluid during which it changes from laminar to turbulent / (geology) The region between the upper and lower mantle characterized by a rapid increase in density

The photic zone

(intransitive) To experience or perceive something bizarre or fantastic. / (intransitive) To behave or occur in a confusing or unexpected manner.

A region or context located in between others and therefore not subject to their norms. / (geography) A deteriorating area surrounding a central business district.