1. A machine-readable lexical database organized by meanings; developed at Princeton University
   - WordNet

Type of: lexical database

• undeclared
• undecomposable
• undecomposed
• undecorated
• undecylenic acid
• undedicated
• undefeated
• undefendable
• undefended
• undeferential
• undefiled
• undefinable
• undefined
• undelete
• undelineated
• undemanding
• undemocratic
• undemocratically
• undemonstrative
• undeniable
• undeniably
• undenominational
• undependability
• undependable
• undependableness