(idiomatic) A difference, albeit vague and difficult to discern.

Reactionary or conservative. / Long-established.

Alternative spelling of breadline

(meteorology) A line of thunderstorms, hundreds of miles long, with squalls at the advancing edge

plural of punch line

(geology) the line that marks the interface between land and water; a shoreline; it changes daily, and over geologic time

plural of line up

A rollerblade: a roller skate with all wheels aligned in a single row along the sole for greater speed and maneuverability.

(manufacturing) A system of workers and machinery in which a product is assembled in a series of consecutive operations; typically the product is conveyed by a continuously moving belt

The altitude, in a mountainous region, above which the ground is covered with snow, at any particular time.