45 CFR 630.650: Grant.

Grant means an award of financial assistance that, consistent with 31 U.S.C. 6304, is used to enter into a relationship—

(a) The principal purpose of which is to transfer a thing of value to the recipient to carry out a public purpose of support or stimulation authorized by a law of the United States, rather than to acquire property or services for the Federal Government's direct benefit or use; and

(b) In which substantial involvement is not expected between the Federal agency and the recipient when carrying out the activity contemplated by the award.