leanˈ-burnˈ adjective

Of, using or relating to a fuel-air mixture in which the fuel component is relatively low, so reducing the amount of fuel used and pollution produced

lean concrete noun

A non-load-bearing concrete of low cement content

lean cuisine noun

Cuisine minceur (qv)

leanˈ-faced adjective

1. Having a thin face
2. Slender and narrow, eg letters (printing)

leanˈ-wittˈed adjective

Of little sense