Definition of "bracket"

bracket¹

/ˈbɹækɪt/

noun
plural brackets
1. A fixture attached to a wall to hold up a shelf.
2. (engineering) Any intermediate object that connects a smaller part to a larger part, the smaller part typically projecting sideways from the larger part.
  Quotations
  To determine if your frame has this bottom bracket type, look for a notched and possibly knurled lockring on the left side (the side without the chainrings).
  2005, Todd Downs, The Bicycling Guide to Complete Bicycle Maintenance & Repair for Road and Mountain bikes
  Not only does the attachment on the tooth surface (called a bracket) allow the tooth to be moved vertically or tilted, but also a force couple can be generated by the interaction between the bracket and an archwire running through the bracket.
  2013, Laura Mitchell, An Introduction to Orthodontics, page 220
3. (nautical) A short crooked timber, resembling a knee, used as a support.
4. (military) The cheek or side of an ordnance carriage, supporting the trunnions.
5. Any of the characters "(", ")", "[", "]", "{", "}", "<" and ">", used in pairs to enclose parenthetic remarks, sections of mathematical expressions, etc.
  1. (UK) "(" and ")" specifically, the other forms above requiring adjectives for disambiguation.
  2. (US) "[" and "]" specifically - as opposed to the other forms, which have their own technical names.
6. (sports) A printed diagram of games in a tournament.
7. (sports) A prediction of the outcome of games in a tournament, used for betting purposes.
8. One of several ranges of numbers.
9. (algebra) A pair of values that represent the smallest and largest elements of a range.
10. (military) Typically of stationary weapons, the zone enclosed by one long and one short shot impact expected to be hit very accurately.
11. (typography) The small curved or angular corner formed by a serif and a stroke in a letter.
12. (land surveying, 19th century) a mark cut into a stone by land surveyors to secure a bench.
verb
third-person singular simple present brackets, present participle bracketing, simple past and past participle bracketed
1. To support by means of mechanical brackets.
2. To enclose in typographical brackets.
3. To bound on both sides, to surround, as enclosing with brackets.
4. To place in the same category.
  Quotations
  "Some villain who knows nothing about it comes into it for money and so the labours of the honest mediums get discounted. The public very naturally brackets them all together."
  1925 July – 1926 May, A[rthur] Conan Doyle, “(please specify the chapter number)”, in The Land of Mist (eBook no. 0601351h.html), Australia: Project Gutenberg Australia, published April 2019
5. To mark distinctly for special treatment.
  Quotations
  Next, since so much social activity is defined by being bracketed out of the world of ongoing events, it becomes possible that outside such bracketed episodes, […] people are — especially beforehand, but also afterwards — to some extent "out of role", and so off their guard.
  1992, Tom Burns, Erving Goffman, page 292
6. To set aside, discount, ignore.
  Quotations
  SIL got access to academic legitimacy; linguists bracketed the evangelical engine that drives SIL because they got access to data and tools.
  2009, Michael Erard, “Holy Grammar, Inc.”, in Search Magazine, July–August 2009
7. (military) To gauge the range of a target by firing equally short and long of it and ranging the weapon between the two to achieve a very accurate hit.
8. (photography) To take multiple images of the same subject, using a range of exposure settings, in order to help ensure that a satisfactory image is obtained.
9. (philosophy, phenomenology) In the philosophical system of Edmund Husserl and his followers, to set aside metaphysical theories and existential questions concerning what is real in order to focus philosophical attention simply on the actual content of experience.

bracket²

/ˈbɹækɪt/

noun
uncountable
1. Alternative form of bragget (“drink made with ale and honey”)