A paradox about a person's expectations about the timing of a future event which they are told will occur at an unexpected time. It is based on the idea that a prisoner, told that he will be hanged on a day unknown to him, concludes that "I cannot be hanged on Friday because if I haven't been hanged by the end of Thursday then it would no longer be a surprise", and so on backwards through the week.

(linguistics, linguistic morphology) Regularisation of a paradigm, alignment of irregular forms on regular forms; replacement of irregular forms by regular forms in an inflection.

Synonym of general paresis of the insane

plural of parallel postulate

A group sex event where participants' car keys are randomly handed out, determining which couples will have sex.

A person (not a spouse) with whom one lives and is romantically involved

(genetics) The observation that the C-value of an organism is not dependent on its complexity (presumed number of genes)

(art) A palette that is positioned close to, and parallel with, the surface being painted

plural of parallel palette

(South Africa, politics) A minor South African political party founded in 2008.