| FIR | English Victorian poet (1809-1892) |
|---|---|
| FIR | the initial stage in accomplishing something |
| FIR | the fielding position of the player on a baseball team who is stationed at first base |
| FIR | the base that must be touched first by a base runner in baseball |
| FIR | (baseball or softball) the person who plays first base |
| FIR | battle in World War I (1914) |
| FIR | a self-caused agent that is the cause of all things |
| FIR | the most expensive accommodations on a ship or train or plane |
| FIR | the highest rank in a classification |
| FIR | mail that includes letters and postcards and packages sealed against inspection |
| FIR | the child of your aunt or uncle |
| FIR | a collective term for numerous olfactory filaments in the nasal mucosa |