Grammar. a member of a subclass of English limiting adjectival words that usually precede descriptive adjectives and include the articles the, a, and an, and any words that may substitute for them, as your, their, some, and each.
a symbol (∼) indicating equivalency or similarity between two values.
a dash one em long.
a short oblique stroke (/) between two words indicating that whichever is appropriate may be chosen to complete the sense of the text in which they occur: