A following of one thing after another; succession. An order of succession; an arrangement. A related or continuous series. See Synonyms at series. Games Three or more playing cards in consecutive order; a run. A series of related shots that constitute a complete unit of action in a movie. Music A melodic or harmonic pattern successively repeated at different pitches with or without a key change. Roman Catholic Church A hymn sung between the gradual and the Gospel. Mathematics An ordered set of quantities, as x, 2x2, 3x3, 4x4. Biochemistry The order of constituents in a polymer, especially the order of nucleotides in a nucleic acid or of the amino acids in a protein. To organize or arrange in a sequence. To determine the order of constituents in (a polymer, such as a nucleic acid or protein molecule).