N consecutive words or characters treated as a Feature. In the phrase, “To be or not to be,” a word Bigram (i.e., 2-gram) would be “to be”; a word An N-Gram where N = 3 (i.e., a 3-gram). (i.e., 3-gram) would be “to be or”; a Quad-Gram (i.e., 4-gram) would be “to be or not”; and so on. See also Shingling. 1


  1. Maura R. Grossman and Gordon V. Cormack, EDRM page & The Grossman-Cormack Glossary of Technology-Assisted Review, with Foreword by John M. Facciola, U.S. Magistrate Judge2013 Fed. Cts. L. Rev. 7 (January 2013).