(intransitive) To make a short, loud, explosive noise with the vocal organs (said of animals, especially dogs). / (intransitive) To make a clamor; to make importunate outcries.

superlative form of duff: most duff

(mathematics) To interconnect two sets. / (transitive, intransitive) To join mutually; to unite. / To say by way of interruption, to interject.

(computing) A system for classification of computer architectures, based on the number of concurrent instruction (or control) streams and data streams available.