1. (informal) in a state of confusion 
2. (informal) in dispute; in disagreement

Encyclopedia: At sixes and sevens

• cumbersomeness
• Cumbria
• cumbrous
• cumfrey
• cumin
• cumin seed
• Cuminum
• Cuminum cyminum
• cummerbund
• cummin
• Cummings
• cumquat
• cumshaw
• cumshot
• cumulate
• cumulation
• cumulative
• cumulative preferred
• Saponaria vaccaria
• saponifiable
• saponification
• saponified
• saponify
• saponin
• saponite