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IFR terminal minimums IFR terminal minimums[¦ī¦ef′är ¦tər·mən·əl ′min·ə·məmz] (meteorology) The operational weather limits concerned with minimum conditions of ceiling and visibility at an airport under which aircraft may legally approach and land under instrument flight rules; these minimums frequently are in the form of a sliding scale, and also vary with aircraft type, pilot experience, and from airport to airport. |