(computer science) A function that takes one or more functions as an input, and returns a function as a result.

Higher-order theories of consciousness postulate that consciousness consists in perceptions or thoughts about first-order mental states.

In mathematics and logic, a higher-order logic (abbreviated HOL) is a form of logic that is distinguished from first-order logic by additional quantifiers and, sometimes, stronger semantics.

Higher-order thinking, also known as higher order thinking skills,British Council, Higher Order Thinking Skills, accessed 6 March 2023 is a concept applied in relation to education reform and

In multilinear algebra, the higher-order singular value decomposition of a tensor is a specific orthogonal Tucker decomposition.