1. Free from stain or blemish
   - immaculate 
2. (of language) not having its purity or excellence debased
   "learn to speak pure English undefiled"
   - uncorrupted

See also: perfect, pure

• Master of Science in Engineering
• Master of Theology
• master plan
• master race
• master sergeant
• master's degree
• master-at-arms
• mastered
• masterful
• masterfully
• mastering
• masterless
• masterly
• mastermind
• masterpiece
• Masters
• mastership
• masterstroke
• masterwork
• masterwort
• mastery
• masthead
• mastic
• mastic tree
• masticate