noun

• A short poetical composition proper to be set to music or sung; a lyric poem; especially, now, a poem characterized by sustained noble sentiment and appropriate dignity of style.
• A surname.
• (mathematical analysis) Initialism of ordinary differential equation. [(calculus) An equation involving the derivatives of a function of only one independent variable.]
• Initialism of Oxford Dictionary of English.
• (computing) Initialism of Orchestration Director Engine.