old_boy has definitions from the field of education
1
[ noun ] a familiar term of address for a man

Synonyms

old_man

Related terms

man

2
[ noun ] a vivacious elderly man

Used in print

(Chicago Daily Tribune...)

But strength and poignancy develop thenceforth , and the windmill and deathbed episodes gather the threads of realization of the wonderfulness of the old_boy .

Related terms

oldster

3
[ noun ] (education) a male ex-pupil of a school

Related terms

alumnus

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