group

[[t]grup[/t]]

n.

1) any collection or assemblage of persons or things; cluster; aggregation

2) a number of persons or things ranged or considered together as being related in some way

3) chem.

Also called radical 12), a) two or more atoms specifically arranged and usu. behaving as a single entity, as the hydroxyl group, –OH.

4) chem. any of the vertical columns of elements in the periodic table

5) gel a division of stratified rocks comprising two or more formations

6) mil

a) an administrative and tactical unit of the U.S. Army consisting of two or more battalions and a headquarters

b) an administrative and operational unit of the U.S. Air Force subordinate to a wing, usu. composed of two or more squadrons

7) mad a section of an orchestra comprising the instruments of the same class

8) math. an algebraic system that is closed under an associative operation, as multiplication or addition, and in which there is an identity element that, on operating on another element, leaves the second element unchanged, and in which each element has corresponding to it a unique element that, on operating on the first, results in the identity element

9) to place together in a group, as with others

10) to form into a group or groups

11) to form a group

12) to be part of a group

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Etymology: 1665–75; < F groupe < It gruppo « Gmc; akin to crop usage: See collective noun