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

Derived forms: numero unos

• adrenergic
• adrenergic agonist eyedrop
• adrenergic drug
• adrenocortical
• adrenocorticotrophic
• adrenocorticotrophic hormone
• adrenocorticotrophin
• adrenocorticotropic
• adrenocorticotropic hormone
• adrenocorticotropin
• adrenosterone
• Adrian
• Adrianople
• Adrianopolis
• Adriatic
• Adriatic Sea
• 'fraid
• 's Gravenhage
• 'tis
• 'twas
• 'tween
• 'tween decks
• 'twere
• 'twixt
• 'zine