Collins COBUILD Advanced Learner's English Dictionary - level off

or level out 1. If a changing number or amount levels off or levels out, it stops increasing or decreasing at such a fast speed. The figures show evidence that murders in the nation’s capital are beginning to level off... Inflation is finally levelling out at around 11% a month. PHRASAL VERB: V P, V P prep 2. If an aircraft levels off or levels out, it travels horizontally after having been travelling in an upwards or downwards direction. The aircraft levelled out at about 30,000 feet. PHRASAL VERB: V P