肉食龙下目（Carnosauria）是群大型掠食性恐龙，生存于侏㑩纪到白垩纪。肉食龙下目最初包含许多种类的大型兽脚亚目恐龙，但这些物种彼此之间并没有接近的关系，而成为复系群；肉食龙下目后来被定义为只包含异特龙超科与牠们的近亲。最近，科学家们发现一些非常大型的肉食龙下目恐龙，例如南方巨兽龙与魁纣龙，牠们属于鲨齿龙科，是最大型的掠食性恐龙之一。

肉食龙下目的明显特征包括：大型眼睛、长而狭窄的头颅骨、以及大幅改变的腿部与骨盆结构（例如股骨比胫骨还长）。

Carnosauria is a large group of predatory dinosaurs that lived during the Jurassic and Cretaceous periods. While it originally contained a wide assortment of giant theropods that were not closely related, the group has since been defined to encompass only the allosaurs and their closest kin. Starting from the 1990s, scientists have discovered some very large carnosaurs in the carcharodontosaurid family, such as Giganotosaurus and Tyrannotitan which are among the largest known predatory dinosaurs.