| prop. n. | 1. | (Chem.) The chemical symbol for the element |
| Noun | 1. | Kr - a colorless element that is one of the six inert gasses; occurs in trace amounts in air Synonyms: atomic number 36, krypton |
| 2. | KR - a communist organization formed in Cambodia in 1970; became a terrorist organization in 1975 when it captured Phnom Penh and created a government that killed an estimated three million people; was defeated by Vietnamese troops but remained active until 1999 |
| 1. | KR - knowledge representation | ||
| 2. | (networking) | kr - The country code for South Korea. |