noun
1. a familiar term of address for a man (Freq. 7)
• Syn: ↑old man
• Hypernyms: ↑man, ↑adult male
2. a vivacious elderly man (Freq. 1)
• Hypernyms: ↑oldster, ↑old person, ↑senior citizen, ↑golden ager
3. a former male pupil of a school
Useful english dictionary. 2012.