bracket

US /ˈbræk.ɪt/
UK /ˈbræk.ɪt/
"bracket" picture
1.

each of a pair of marks [ ] or ( ) or { } used to enclose words or figures so as to separate them from the rest of the text.

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Please put the additional information in brackets.
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The formula is enclosed in square brackets.
:
parenthesisbracesquare bracketcurly bracket
2.

a support, usually L-shaped, fixed to a wall to hold a shelf, lamp, or other object.

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He installed a new shelf using metal brackets.
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The lamp was held up by a decorative bracket.
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supportpropholdermount
3.

a category of people or things that are grouped together, especially by age, income, or other characteristics.

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The new tax policy affects people in the lower income bracket.
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He falls into the 30-40 age bracket.
:
categorygroupclassrangetier
1.

to enclose (words or figures) in brackets.

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You should bracket the optional information.
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The editor decided to bracket the author's comments.
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encloseparenthesizebrace
2.

to group (two or more people or things) together.

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The survey results were bracketed by age group.
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We need to bracket these tasks together for efficiency.
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groupclassifycategorizesortcluster