Noah Webster's Dictionary (a.) Done by intention or design; intended; designed; as, the act was intentional, not accidental.

Multi-Version Concordance Intentional (1 Occurrence) Numbers 15:25 The priest shall make atonement for all the congregation of the children of Israel, and they shall be forgiven; for it was an error, and they have brought their offering, an offering made by fire to Yahweh, and their sin offering before Yahweh, for their error: (See NIV)