Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun old_boy

3 senses of old boy

Sense 1
old boy, old man -- (a familiar term of address for a man)
       => man, adult male -- (an adult person who is male (as opposed to a woman); "there were two women and six men on the bus")

Sense 2
old boy -- (a vivacious elderly man)
       => oldster, old person, senior citizen, golden ager -- (an elderly person)

Sense 3
old boy -- (a former male pupil of a school)
       => alumnus, alumna, alum, graduate, grad -- (a person who has received a degree from a school (high school or college or university))