First; foremost; best, often used after its headword.
The main goalkeeper of a team, so-called because they wear the number 1 on the back of their kit.
The most important person, the one who is in charge.
Urine; urination.
A large town where theatrical performances may expect to achieve success.
Used other than figuratively or idiomatically: see number, one.
Oneself, being considered foremost, as by an egoist.
Someone who is top of a ranking, who is ranked first.
The batsman who opens the batting.
The single that has sold the most in a given period.
A first lieutenant.
Best; first-class.
The principal part of a duet.