1. (informal) oneself, especially one's own interests 
2. (informal) the most important of a group of people

Derived forms: numero unos

• bite-sized
• biteplate
• biter
• bitewing
• Bithynia
• biting
• biting louse
• biting midge
• bitingly
• Bitis
• Bitis arietans
• Bitis gabonica
• bitmap
• bitok
• bits per inch
• bits per second
• bitstock
• bitt
• bitt pin
• Bittacidae
• bitter
• bitter almond
• bitter almond oil
• bitter aloes
• bitter betch