1.NounA mark consisting of multiple full stops (with or without spaces), used to indicate omitted, missing, or illegible words; or (in mathematics) that a pattern continues."The ellipsis in 1, 2, 3, ..., 8, 9 means that the numbers 4, 5, 6, and 7 are not explicitly included, but are considered to be part of the pattern.; The ellipsis in 0.333... means that the number is a repeating decimal, having threes that go on forever."