A number of things of the same kind growing together; a bunch.
- A group of the same or similar elements gathered or occurring closely together; a bunch: "She held out her hand, a small tight cluster of fingers” ( Anne Tyler).
- Linguistics Two or more successive consonants in a word, as cl and st in the word cluster.
- A group of academic courses in a related area.
- To gather or grow into bunches.
- To cause to grow or form into bunches.