also: だいと
noun
great city; large city; metropolis
Refers to a major urban center; somewhat formal or literary. Often used in historical or descriptive contexts.
江戸は当時、世界有数の大都だった。
Edo was one of the world's great cities at that time.
この小説は、架空の大都を舞台にしている。
This novel is set in a fictional metropolis.
Compound of 大 (great) and 都 (capital/city). The reading たいと uses the on'yomi of both characters; だいと is a variant reading.