The Collaborative International Dictionary of English v.0.48:
Ld \Ld.\ n. The abbreviation for limited, term appended to the name of a company that is organized to give its owners limited liability; also abbreviated Ltd. It corresponds to Inc. in the United States. [Chiefly British] [abbr.] Syn: limited company, Ltd. [WordNet 1.5]WordNet (r) 3.0 (2006):
Ld. n 1: a company that is organized to give its owners limited liability [syn: limited company, Ltd., Ld.]