Definition of saddleback

• a. - Same as Saddle-backed.
• n. - Anything saddle-backed; esp., a hill or ridge having a concave outline at the top.
• n. - The harp seal.
• n. - The great blackbacked gull (Larus marinus).
• n. - The larva of a bombycid moth (Empretia stimulea) which has a large, bright green, saddle-shaped patch of color on the back.