as many as; as much as; up to; nearly
The particle も, when placed after a quantity expression, emphasizes that the number or amount is surprisingly large, meaning 'as many as' or 'up to'.
This も is used to show that a number or amount is bigger than the speaker expected or wants to emphasize. It often carries a nuance of surprise, admiration, or even criticism. For example, if you say 三時間も待った, it means you waited three whole hours—that's a long time. The sentence structure is the same as the 'also' も, but the meaning is different, and the context makes it clear which is intended. Note that this も is used with concrete quantities, not with general amounts like たくさん. It is common in both speaking and writing, but in casual conversation, the intonation often emphasizes the も.