WordNet (r) 3.0 (2006):
Sinclair n 1: United States writer whose novels argued for social reform (1878-1968) [syn: Sinclair, Upton Sinclair, Upton Beall Sinclair] 2: English electrical engineer who founded a company that introduced many innovative products (born in 1940) [syn: Sinclair, Clive Sinclair, Sir Clive Marles Sinclair]