Definitions for "Trim line"
Keywords:  kite, artwork, aoa, wingtips, surfing
in a 4 line inflatable kite is a the line that goes from the loop at the center of the control bar (chicken loop) to the two flying lines connected to the front of the kite. Adjusting its length adjusts the "trim" or angle of attack (AoA) of the kite. Changing this adjustment can increase the AoA for more lift or decreasing the AoA for less lift.
an assembly line where various parts are assembled into a car body
Line on artwork indicating where to cut to remove the waste on a printed piece.