Contract means a legal instrument by which a non-Federal entity purchases property or services needed to carry out the project or program under a Federal award. The term as used in this part does not include a legal instrument, even if the non-Federal entity considers it a contract, when the substance of the transaction meets the definition of a Federal award or subaward (see Subaward).
45 CFR § 75.2
These are the definitions for terms used in this part. Different definitions may be found in Federal statutes or regulations that apply more specifically to particular program or activities. These definitions could be supplemented by additional instructional information provided in in governmentwide standard information collections.