(transitive) To bring (two or more things or activities) together; to unite. / (transitive) To have two or more things or properties that function together. / (intransitive) To come together; to unite.

A combine harvester

The act of combining, the state of being combined or the result of combining. / An object formed by combining. / A sequence of numbers or letters used to open a combination lock.

A battle, a fight (often one in which weapons are used). / a struggle for victory

(transitive) To fight; to struggle against. / (intransitive) To fight (with); to struggle for victory (against).

A person engaged in combat, often armed.

Contending; disposed to contend. / Involving combat.

A person who engages in combat without meeting the requirements for a lawful belligerent according to the laws of war as specified in the Third Geneva Convention.

The process where fuel is burned within an engine such as a diesel engine, producing power directly as opposed to externally such as in a steam engine.

(chemistry) The synthesis of a large number of structurally related compounds, especially in the pharmaceutical industry in an attempt to produce improved drugs.