Definition:Word (Formal Systems)

Definition
Let $\mathcal A$ be an alphabet.

Then a word in $\mathcal A$ is a juxtaposition of finitely many (primitive) symbols of $\mathcal A$.

Words are the most ubiquitous of collations used for formal languages.

Also known as
Different treatments of formal languages use different terms for word.

Examples include formula, sentence and string.

However, these alternatives conflict with the concepts logical formula, sentence and string, respectively, in the scope of this site; therefore, their use is discouraged.

Also see

 * Well-Formed Word, a word in $\mathcal A$ admitted by the formal grammar of some formal language
 * Collation, a generalization of a word as a means to present information in a structured manner