1. Definitely or certainly
   "Visit us by all means"

Antonym: by no means

• mercy killing
• mercy seat
• mere
• Meredith
• merely
• merengue
• merestone
• up-to-the-minute
• Upanishad
• upas
• upbeat
• upbound
• upbraid
• upbraider
• upbraiding
• upbringing
• upcast
• upchuck
• upcoming
• upcountry
• upcurved
• update
• updating
• updation
• Updike