(grammar) A type of word part; a bound morpheme; used in combination with a word, a different combining form, or an affix to form a new word.

A combine, a farming machine that harvests, threshes, and cleans grain plants.

(US, medicine) A product composed of two or more regulated components, i.e., drug/device, biologic/device, drug/biologic, or drug/device/biologic, that are physically, chemically, or otherwise combined as a single entity.

(linear algebra) a sum, each of whose summands is an appropriate vector times an appropriate scalar (or ring element)

plural of linear combination

(electronics) A switching circuit whose output is determined solely by some combination of its concurrent inputs.

plural of combining form

plural of combination product

(UK, Cambridge University) A common room.

plural of combination room