| group | |
| 1. n. A number of things or persons being in some relation to one another. | |
| there is a group of houses behind the hill; he left town to join a Communist group | |
| A group of people gathered in front of the Parliament to demonstrate against the Prime Minister's proposals. | |
| 2. n. (group theory) A set with an associative binary operation, under which there exists an identity element, and such that each element has an inverse. | |
| 3. n. (geometry, archaic) An effective divisor on a curve. | |
| 4. n. A (usually small) group of people who perform music together. | |
| Did you see the new jazz group? | |
| 5. n. (astronomy) A small number (up to about fifty) of galaxies that are near each other. | |
| 6. n. (chemistry) A column in the periodic table of chemical elements. | |
| 7. n. (chemistry) A functional group. | |
| Nitro is an electron-withdrawing group. | |
| 8. n. (sociology) A subset of a culture or of a society. | |
| 9. n. (military) An air force formation. | |
| 10. n. (geology) A collection of formations or rock strata. | |
| 11. n. (computing) A number of users with same rights with respect to accession, modification, and execution of files, computers and peripherals. | |
| 12. n. An element of an espresso machine from which hot water pours into the portafilter. | |
| 13. n. (music) A number of eighth, sixteenth, etc., notes joined at the stems; sometimes rather indefinitely applied to any ornament made up of a few short notes. | |
| 14. n. (sports) A set of teams playing each other in the same division, while not during the same period playing any teams that belong to other sets in the division. | |
| 15. n. (business) A commercial organization. | |
| 16. v. To put together to form a group. | |
| group the dogs by hair colour | |
| 17. v. (intransitive) To come together to form a group. | |
