When people are called up to the Torah by name, often there is a title that goes with them, such as "ha-bachur" for a young man, "ha-rav" for a rabbi (and/or someone with semicha), and other such titles.
....Or at least I assume "ha-bachur" is reserved for young men....today someone got called up for an aliyah; when asked for his name, he replied "ha-bachur Ploni etc." He appeared to be at least over 60 years old.
What do these titles mean, and where do they come from?
[And, most urgently, was my elderly friend entitled to his use of the prefix "ha-bachur"???]