Definition from Wiktionary, the free dictionary
- bachelor (unmarried man)
- (uncommon, often capitalized) title for an unmarried male, coordinate to Miss (honorific)
Unlike Sinjoro (Mister), Sinjorino (Madam, Mistress) and Fraŭlino (Miss), Fraŭlo is not commonly used as courtesy title. Not quite equivalent to English "Master", as that is age-based rather than marriage-based.