define: kiss

Got this from the web

Prof. of EconomicsKiss is that thing for which the demand is aways higher than the supply.
Prof. of AccountancyKiss is a credit because it is profitable when returned.
Prof. of AlgebraKiss is infinity because two divided by nothing.
Prof. of GeometryKiss is the shortest distance between two lips.
Prof. of PhysicsKiss is the contraction of mouth due to the expansion of the heart.
Prof. of ChemistryKiss is the reaction of the interaction between two hearts.
Prof. of PhysiologyKiss is the juxtaposition of two orbicularisoris muscles in the state of contraction.
Prof. of DentistryKiss is infectious and antiseptic.
Prof. of PhilosophyKiss is the persecution for the child, ecstasy for the youth and homage for the old.
Prof. of Comp.ScienceWhat is a kiss? It seems to be an undefined variable!
Prof. of EnglishKiss is a noun that is used as a conjunction, it is more common than proper, it is spoken in the plural and it is applicable to all.