1. In isolation and without reference to anything else 
2. In a vacuum

Encyclopedia: In vacuo

• prove oneself
• proved
• proven
• provenance
• provencal
• Provence
• provender
• provenience
• Proventil
• prover
• Provera
• proverb
• proverbial
• proverbially
• Proverbs
• provide
• provided
• providence
• provident
• providential
• providentially
• providently
• provider
• province
• provincial