| SIR | term of address for a man |
|---|---|
| SIR | (British) a title used before the name of knight or baronet |
| SIR | English physiologist who, with Andrew Huxley, discovered the role of potassium and sodium atoms in the transmission of the nerve impulse (born in 1914) |
| SIR | English stage and screen actor noted for versatility (1914-2000) |
| SIR | English bacteriologist who discovered penicillin (1881-1955) |
| SIR | British filmmaker (born in Hungary) (1893-1956) |
| SIR | Canadian explorer (born in England) who explored the Mackenzie River and who was first to cross North American by land north of Mexico (1764-1820) |
| SIR | Scottish chemist noted for his research into the structure of nucleic acids (born in 1907) |
| SIR | English astronomer who pioneered radio astronomy (born in 1913) |
| SIR | English film director noted for his skill in creating suspense (1899-1980) |
| SIR | English writer of novels and short stories (1913-1991) |
| SIR | Welsh film actor (born in 1937) |