# roster

Pronunciation: US say "RAW-stur" /ˈɹɔ.stɚ/; UK say "ROS-tuh" /ˈɹɒs.tə/; AUS say "RAW-stuh" /ˈɹɔs.tə/

## Noun

1. A list of the individuals or groups belonging to an organization, such as personnel in a military unit, eligible players on a sports team, or students enrolled in a class.
   - Simple: A list of the people in a group, such as a sports team, a class, or a military unit.
   - _The captain checked the roster to confirm which players were available for the final._
   - _The sergeant read the names off the unit roster at morning formation._
2. A list of the tasks to be carried out by members of an organization, often noting the date and time each one is expected to be done.
   - Simple: A list of the jobs that group members need to do, often with the dates and times.
   - _The duty roster told each nurse which rounds to handle and when._
   - _Our scout leader drew up a roster of camp duties for the weekend._
3. A work schedule listing the days and shifts that each employee of a business is due to work.
   - Simple: A work schedule that shows when each worker is on shift.
   - _The new roster has me working three evenings and two mornings this week._
   - _Head office released the holiday roster a month before the busy season._
5. A way of writing a set as a bracketed list that shows each of its elements.
   - Simple: In math, a way of writing a set by listing all its parts inside brackets.
   - _She expressed the set of vowels as a roster: {a, e, i, o, u}._
   - _For finite sets, a roster lists every element between braces._

## Verb

4. To enter a person's name onto a roster.
   - Simple: To add a person's name to an official list of members or duties.
   - _The duty officer rostered three nurses for the night shift._
   - _Management will roster you for the early slot next week._
6. In mathematics, to specify a set by writing out its members in a list enclosed in curly brackets.
   - Simple: To write a set by listing all its parts inside brackets.
   - _Students learned to roster a set before moving on to set-builder notation._
   - _He rostered the solution set as {0, 1}._

## Origin

Borrowed from Dutch rooster ("gridiron, table, list"), which comes from Middle Dutch roosten ("to roast").

Source: DictionaryAI, https://dictionaryai.com/define/roster (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).