noun
Tokyo Metropolitan Assembly member; metropolitan assembly member
A political noun used especially in news reporting. In practice, 都 usually points to 東京都, so 都議 means a member of the Tokyo Metropolitan Assembly; the full form is 都議会議員.
彼は新宿区選出の都議だ。
He is a Tokyo Metropolitan Assembly member elected from Shinjuku Ward.
都議が新しい条例案に賛成した。
The metropolitan assembly member supported the new ordinance bill.
A city council member; 都議 belongs to the metropolitan assembly level rather than a municipal city council.
A compact compound from 都, referring here to 東京都 or the metropolitan government, and 議, associated with assembly membership as in 議員. It is effectively a shortened form of 都議会議員.