証しょう券けん会がい社しゃしょうけんがいしゃMeanings1nounsecurities company; brokerage firmA financial institution that buys and sells securities such as stocks and bonds on behalf of clients.彼かれは大おお手ての証しょう券けん会がい社しゃに勤つとめている。He works for a major securities company.
