bracket

nouns

a category falling within certain defined limits
is a type of (narrower)
a group of things of the same kind that belong together and are so used
"a set of books"; "a set of golf clubs"; "a set of teeth"
either of two punctuation marks (`<' or `>') used in computer programming and sometimes used to enclose textual material
either of two punctuation marks ([ or ]) used to enclose textual material
a support projecting from a wall (as to hold a shelf)

verbs

support with brackets
"bracket bookshelves"
is a type of (narrower)
be the physical support of; carry the weight of
"The beam holds up the roof"; "He supported me with one hand while I balanced on the beam"; "What's holding that mirror?"
place into brackets
"Please bracket this remark"
classify or group
is a type of (narrower)
arrange into a group or groups
"Can you group these shapes together?"