| SEC | an order of fungi belonging to the class Gasteromycetes |
|---|---|
| SEC | a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc |
| SEC | the trait of keeping things secret |
| SEC | the condition of being concealed or hidden |
| SEC | something that baffles understanding and cannot be explained |
| SEC | information known only to a special group |
| SEC | something that should remain hidden from others (especially information that is not to be passed on) |
| SEC | not openly made known |
| SEC | the next to highest level of official classification for documents |
| SEC | having an import not apparent to the senses nor obvious to the intelligence |
| SEC | not expressed |
| SEC | conducted with or marked by hidden aims or methods |