| BIR | a card expressing a birthday greeting |
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| BIR | a present given in celebration of a person's birthday |
| BIR | a party held on the anniversary of someone's birth |
| BIR | a present given in celebration of a person's birthday |
| BIR | informal terms for nakedness |
| BIR | the process of giving birth |
| BIR | having to do with birth |
| BIR | a blemish on the skin formed before birth |
| BIR | the place where someone was born |
| BIR | where something originated or was nurtured in its early existence |
| BIR | the ratio of live births in an area to the population of that area |
| BIR | personal characteristics that are inherited at birth |