Meaning of metaethics

met•a•eth•ics

Pronunciation: (met"u-eth'iks, met'u-eth"-), [key]
— n. (usually used with a sing. v.)
  1. the philosophy of ethics dealing with the meaning of ethical terms, the nature of moral discourse, and the foundations of moral principles.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.