28 CFR 40.1 - Definitions.
For the purposes of this part -
(d) Grievance means a written complaint by an inmate on the inmate's own behalf regarding a policy applicable within an institution, a condition in an institution, an action involving an inmate of an institution, or an incident occurring within an institution. The term “grievance” does not include a complaint relating to a parole decision.
(e) Inmate means an individual confined in an institution for adults, who has been convicted of a crime.
(f) Institution means a jail, prison, or other correctional facility, or pretrial detention facility that houses adult inmates and is owned, operated, or managed by or provides services on behalf of a State or political subdivision of a State.
(h) Substantial compliance means that there is no omission of any essential part from compliance, that any omission consists only of an unimportant defect or omission, and that there has been a firm effort to comply fully with the standards.