1.Preposition[Of one variable or unit of measurement which has a known relationship to another] Using equivalent expressions that use one variable in place of expressions involving the other.
"If x=2y then 5x can be expressed in terms of y as 10y."
2.PrepositionIn relation to a particular aspect; with respect to; as regards; concerning; regarding.
"I switched to a different bank for better customer service, but there was little difference in terms of interest rates.; She has no idea how she wants the house to look in terms of décor."