group

noun

• 1a number of people or things that are located, gathered, or classed together:a group of boys approached the bulbs should be planted in groups
• a number of people that work together or share certain beliefs:I now belong to my local drama group
• a commercial organization consisting of several companies under common ownership:the largest newspaper group in the UK
• a number of musicians who play popular music together: I’ve always been a fan of the guitarists in the group
• Military a division of an air force, usually consisting of two or more stations.

• 2 Chemistry a set of elements occupying a column in the periodic table and having broadly similar properties arising from their similar electronic structure.
• a combination of atoms having a recognizable identity in a number of compounds: a methyl group

• 3 Mathematics a set of elements, together with an associative binary operation, which contains an inverse for each element and an identity element.

• 4 Linguistics (in systemic grammar) a level of structure between clause and word, broadly corresponding to phrase in other grammars.

verb

• put in a group or groups:three chairs were grouped around a table
• put into categories; classify:molluscs are grouped into seven different classes
• [no object, with adverbial] form a group or groups:growers began to group together to form cooperatives