godan verb (-mu), intransitive verb
be crowded; be packed; be congested
Used when a place, area, counter, or similar situation is crowded or packed. Often suggests things or people are close together or business is heavy.
この辺りは家が立て込んでいて、日当たりが悪い。
Houses are packed close together around here, so it gets poor sunlight.
週末の窓口は客で立て込んでいた。
The service counter was crowded with customers over the weekend.
godan verb (-mu), intransitive verb
be busy with work; have a packed schedule; have one's hands full
Common with 仕事, 用事, 予定, 会議, and similar nouns, meaning that many tasks or appointments have accumulated.
今週は仕事が立て込んでいて、早く帰れない。
Work is piled up this week, so I can't go home early.
午後は会議が立て込んでいる。
My afternoon is packed with meetings.