Bracket

GRE 蓝宝考研

[编辑] 解释

I. noun

Etymology: perhaps from Middle French braguette codpiece, from diminutive of brague breeches, from Old Occitan braga, from Latin braca, of Celtic origin — more at breech
Date: 1580
1. an overhanging member that projects from a structure (as a wall) and is usually designed to support a vertical load or to strengthen an angle
2. a fixture (as for holding a lamp) projecting from a wall or column
3.
- a. one of a pair of marks \［ \］ used in writing and printing to enclose matter or in mathematics and logic as signs of aggregation — called also square bracket
- b. one of the pair of marks< > used to enclose matter — called also angle bracket
- c. parenthesis 3
- d. brace 5b
4. a section of a continuously numbered or graded series (as age ranges or income levels)

II. transitive verb

Date: circa 1847
1.
- a. to place within or as if within brackets <editorial comments are bracketed><news stories bracketed by commercials>
- b. to eliminate from consideration <bracket off politics>
- c. to extend around so as to encompass ; include <test pressures…which bracket virtually the entire range of passenger-car tire pressures — Consumer Reports>
2. to furnish or fasten with brackets
3. to put in the same category or group <bracketed in a tie for third>
4.
- a. to get the range on (a target) by firing over and short <there were mortar rounds bracketing the area — Ed Bradley>
- b. to establish the limits of <bracketed the problem neatly>
- c. to take photographs of at more than one exposure in order to ensure that the desired exposure is obtained