A crowded train packed with passengers; commonly refers to heavily congested trains during rush hours in cities.
毎朝満員電車で通勤するのは大変だ。
Commuting on a crowded train every morning is tough.
ラッシュ時を避ければ満員電車に乗らずに済む。
If you avoid rush hour, you can avoid riding a crowded train.
満員電車ではドア付近に立つことが多い。
On crowded trains, you often have to stand near the doors.