1. All living and non-living things that occur on the planet Earth. 2. To mention or speak about someone or something. 3. To consist of particular parts, groups, etc. 4. To make someone feel worried or upset. 5. The act or process of destroying something or being destroyed. 6. Animals and plants growing in natural conditions. 7. A situation in which there isn’t enough of something that people need. 8. Something such as useful land, or minerals such as oil or coal, that exists in a country and can be used to increase its wealth.