present participle of cross the line

(management) Any primary business function that would affect customers or profits if interrupted

(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.