n. 1. The quality or state of being flat. [ 1913 Webster ]
2. Eveness of surface; want of relief or prominence; the state of being plane or level. [ 1913 Webster ]
3. Want of vivacity or spirit; prostration; dejection; depression. [ 1913 Webster ]
4. Want of variety or flavor; dullness; insipidity. [ 1913 Webster ]
5. Depression of tone; the state of being below the true pitch; -- opposed to sharpness or acuteness. [ 1913 Webster ]