1. In a meaningless and purposeless manner
   "these innocent bystanders were senselessly killed" 
2. In an unreasonably senseless manner
   - mindlessly

See also: senseless

• pica em
• Pica pica hudsonia
• pica-pica
• picador
• picaninny
• Picardie
• Picardy
• picaresque
• Picariae
• picaro
• picaroon
• Picasso
• picayune
• piccalilli
• piccaninny
• piccolo
• pice
• Picea
• Picea abies
• Picea breweriana
• Picea engelmannii
• Picea glauca
• Picea mariana
• Picea obovata
• Picea orientalis