A severe psychiatric condition, often associated with schizophrenia, characterized by a tendency to remain in a rigid state of stupor for long periods which give way to short periods of extreme agitation.

Of or pertaining to a cataclysm; causing great destruction or upheaval; catastrophic.

Any place or repository where things are placed indiscriminately or without careful thought.

(biology) The extinction of an organism (usually microorganisms) due to excessive RNA mutations.

(automotive) A chamber containing a finely divided platinum catalyst in which carbon monoxide and hydrocarbons from the exhaust are oxidized to carbon dioxide.

(board sports, idiomatic) To make a jump.

(idiomatic) (Extreme sports) Superlative of catch air; make a big jump high off the ground

Non-Oxford British English standard spelling of categorize.

(chemistry) An aluminoxane, prepared from an alkyl-aluminium and water, used as a catalyst in the manufacture of polyether elastomers.

(US) A wild animal of the family Felidae, especially the cougar or puma (Puma concolor). / (obsolete) Synonym of catamountain (“a leopard, a panther (Panthera pardus)”).