Meaning

• (usually in the plural) Operation; action.

• Method of operation.

• The incidental or subsidiary calculations performed in solving an overall problem.

  "Be sure to check your working."

• Fermentation.

• (of bodies of water) Becoming full of a vegetable substance.

• A place where work is carried on.

  "the abandoned mine workings"

Meaning

• The internal mechanism of some device or system.

• The parts of a quarry or mine that are being (or has been) worked.