Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary


noun \ˈsplīn\

Definition of spline

  1. 1 :  a thin wood or metal strip used in building construction

  2. 2 :  a key that is fixed to one of two connected mechanical parts and fits into a keyway in the other; also :  a keyway for such a key

  3. 3 :  a function that is defined on an interval, is used to approximate a given function, and is composed of pieces of simple functions defined on subintervals and joined at their endpoints with a suitable degree of smoothness

Origin of spline

origin unknown

First Known Use: 1756

Seen and Heard

What made you want to look up spline? Please tell us where you read or heard it (including the quote, if possible).


marked by grandiloquent style

Get Word of the Day daily email!