A facility or part of a facility with minimal restrictions, designed to hold the least dangerous criminals of society.

Of a prison, having limited security and offering prisoners certain freedoms.

absolute minimum; the least of all minimums.

(roller derby) The test of roller skating ability which all competitors must pass in order to play.

The part of the sun's 11-year cycle during which the number of sunspots and solar flares is at a minimum.

plural of minimum cut

(graph theory) A cut that is minimal in some metric.

(mathematics) An element in a function's domain where the function assumes its lowest value.

(aviation, travel) The amount of time, agreed in advance between airlines and airport authorities, that is considered sufficient for a passenger to make a connection between an arriving flight and a departing flight on the same ticket.

(aviation) The lowest altitude at which an aircraft is permitted to fly during a non-precision approach without the runway being in clear sight.