Default \De*fault"\, v. i. [imp. & p. p. {Defaulted}; p. pr. & vb. n. {Defaulting}.] 1. To fail in duty; to offend. [1913 Webster] That he gainst courtesy so foully did default. --Spenser. [1913 Webster] 2. To fail in fulfilling a contract, agreement, or duty. [1913 Webster] 3. To fail to appear in court; to let a case go by default. [1913 Webster]