| 1. | a pocketlike, usually more or less circular structure of twigs, grass, mud, etc., formed by a bird, often high in a tree, as a place in which to lay and incubate its eggs and rear its young; any protected place used by a bird for these purposes. |
| 2. | a place used by insects, fishes, turtles, rabbits, etc., for depositing their eggs or young. |
| 3. | a number of birds, insects, animals, etc., inhabiting one such place. |
| 4. | a snug retreat or refuge; resting place; home. |
| 5. | an assemblage of things lying or set close together, as a series of boxes or trays, that fit within each other: a nest of tables. |
| 6. | a place where something bad is fostered or flourishes: a nest of vice; a robber's nest. |
| 7. | the occupants or frequenters of such a place. |
| 8. | to settle or place (something) in or as if in a nest: to nest dishes in straw. |
| 9. | to fit or place one within another: to nest boxes for more compact storage. |
| 10. | to build or have a nest: The swallows nested under the eaves. |
| 11. | to settle in or as if in a nest. |
| 12. | to fit together or within another or one another: bowls that nest easily for storage. |
| 13. | to search for or collect nests: to go nesting. |
| 14. | Computers. to place a routine inside another routine that is at a higher hierarchical level. |

| NEST non-surgical embryonic selective thinning |