transitive verb
: to make smooth or even
dry ingredients are heaped into the utensil, then leveled off with a knife — Ida B. Allen
bulldozers quickly leveled off the site
intransitive verb
1. : to reach a constant rate or unvarying volume, total, or amount : attain equilibrium : stabilize
populations often level off as they press harder on natural resources
the signs are that unemployment is leveling off — Wall Street Journal
2. : to change a flight path to horizontal after a climb, glide, or dive
3. : to approach a limit
the plate current in a vacuum tube levels off as the applied voltage is increased