A word is a finite or infinite sequence of letters from an alphabet. A finite word of length 
is sometimes called an 
-letter word. Infinite words may be right-infinite or bi-infinite.
A finite substring occurring in a word is called a
factor of the word.
Word
See also
Critical Exponent, Cubefree Word, Factor Complexity, Kleene Star, List, n-Tuple, Overlapfree Word, Reduced Word, Squarefree Word, String, String Attractor, Substring, Subword, Word MorphismExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Word." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Word.html