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

Encyclopedia: At sixes and sevens

• halfway house
• Haliaeetus
• Haliaeetus leucocephalus
• Haliaeetus leucorhyphus
• Haliaeetus pelagicus
• Haliatus albicilla
• halibut
• halibut-liver oil
• Halicarnassus
• Halicoeres
• Halicoeres bivittatus
• Halicoeres radiatus
• Halictidae
• halide
• halidom
• Halifax
• Haligonian
• Halimodendron
• Halimodendron argenteum
• Halimodendron halodendron
• Haliotidae
• Haliotis
• Haliotis tuberculata
• halite
• halitosis