Entry 3 senses · 2 variants Webster, 1913 Saddleback · Sad·dle·back · IPA a. n. 01 a. Same as Saddle-backed. 1. Same as Saddle-backed. See: Saddle-backed Phrases & compounds Saddleback roof — See Saddle roof, under Saddle. 02 n. Anything saddle-backed; esp., a hill or ridge having a concave outline at the top. 1. Anything saddle-backed; esp., a hill or ridge having a concave outline at the top. 2. The harp seal.(Zool.)