topline noun 5verb 3forms 3 noun5 •The upper curvature of a horse's or dog's withers, back, and loin.When viewing the horse in profile, attention must be paid to the curvature and proportions of the topline. — 2002 •[before a noun] Top billing.In recent weeks Cosby has, perhaps more than any other topline entertainer of the moment, been both at the pinnacle and at the crossroads. — 1969 •[before a noun] The first line, the topmost-ranking line; the most important thing. •The edge that runs along the top of the opening of a shoe. •The vocal parts of a piece of music (particularly pop). verb3 •To bill (a performer) as the primary entertainer in a production. •To be billed as the primary entertainer in (a production). •(music) To compose and/or sing the vocal part of a song (particularly pop). formstoplined · toplining · toplines
