gathering of excellent and capable people
A yojijukugo describing a place or group filled with talented individuals, like a garden full of peach and plum blossoms. Used in formal or literary contexts to praise a school, company, or organization.
His classroom is truly a gathering of excellent people, filled with outstanding students.
This research institute has such a gathering of capable researchers that it can be called 'tōrimanmon'.
Both mean a gathering of talented people, but 多士済々 is more common and neutral, while 桃李満門 carries a poetic, garden-like metaphor and is rarer.
From Chinese origin, literally 'peach and plum fill the gate', a metaphor for a place where many talented disciples or capable people gather, like a garden full of blossoms.