the straight and narrow

: free from curves, bends, angles, or irregularities

: generated by a point moving continuously in the same direction and expressed by a linear equation

: lying along or holding to a direct or proper course or method

: in a straight manner

: straighten

: something that is straight: such as

: a straight line or arrangement

: straightaway

: of slender width

: of less than standard or usual width

: woven in widths usually less than 18 inches (46 centimeters)

: to decrease the breadth or extent of : contract

: to decrease the scope or sphere of : limit

: to lessen in width or extent : contract

: a narrow part or passage