| endangered species definitions |
| # | Definition | Sets |
| 1 | kinds of living things that are in danger of dying out | 28 sets |
| 2 | a species whose numbers are so small that the species is at risk of extinction | 26 sets |
| 3 | species whose population size is rapidly declining and will become extinct if the trend continues | 17 sets |
| 4 | a species that is in danger of extinction throughout all or a significant portion of its range | 15 sets |
| 5 | a species with so few living members that it is in danger of becoming extinct | 7 sets |
| 6 | a species that is in danger of extinction throughout all or a significant portion of its range. | 7 sets |
| 7 | a species whose population size is declining in a way that places it in danger of extinction | 6 sets |
| 8 | when its numbers become so low that extinction is possible | 6 sets |
| 9 | a species in danger of becoming extinct in the near future | 5 sets |
| 10 | a species in which the number of individuals falls so low that extinction is possible | 4 sets |
| 11 | a species considered to be in imminent danger of extinction | 4 sets |
| 12 | a species of plant or animal of which numbers are decreasing at an alarming rate and is threatened with extinction by human-made or natural changes in the environment | 4 sets |
| 13 | when a species numbers become so low that extinction is possible | 3 sets |
| 14 | a species that is close to extinction | 3 sets |
| 15 | a species of animal or plant threatened with extinction | 3 sets |
| 16 | a species that is in danger of becoming extinct | 3 sets |
| 17 | north spotted owl (loss of old growth forest), bald eagle (thinning of eggs caused by ddt), piping plover (nesting areas threatened by development) | 3 sets |
| 18 | there are almost no animals left of the species | 3 sets |
| 19 | a species that is likely to become extinct if protective measures are not taken immediately | 3 sets |
| 20 | a species in danger of becoming extinct in the near future. | 3 sets |
| 21 | species in danger of becoming extinct | 3 sets |
| 22 | plant or animal under the threat of completely dying out | 2 sets |
| 23 | when a population is declining and it is in danger of extinction | 2 sets |
| 24 | veszélyeztetett fajok | 2 sets |
| 25 | when a species is close to becoming extinct | 2 sets |
| 26 | numbers become so low that extinction is possible | 2 sets |
| 27 | a species that is likely to become extinct | 2 sets |
| 28 | (noun) plants and animals that are in danger of disappearing or dying out | 2 sets |
| 29 | a species whose population has been reduced to where it is in imminent danger of becoming extinct if protection is not provided | 2 sets |
| 30 | a species in danger of becoming extinct | 2 sets |
| 31 | a species that is likely to become extinct if protective measures are not taken immediately. | 2 sets |
| 32 | a species that is likely to become extinict if protective measures are not taken immediately. | 2 sets |
| 33 | veszélyeztetett faj | 2 sets |
| 34 | a species that is in serious danger of becoming extinct. | 2 sets |
| 35 | a plant or animal threatened with extinction | 2 sets |
| 36 | when numbers become so low extinction is possible | 2 sets |
| 37 | las especies en peligro de extinción | 2 sets |
| 38 | a species with so few living members that it is in danger of becoming extinct. | 2 sets |
| 39 | animal or plant species that is in danger of coming extinct throughout all or a significant portion of its range due to harmful human activities or environmental factors. | 2 sets |
| 40 | especies en peligro de extinción | 2 sets |