(Definition of âditchâ from the Cambridge Advanced Learner's Dictionary & Thesaurus Â© Cambridge University Press) See all translations. us â /dÉªtÊ/. âº a long, narrow, open channel dug in the ground, usually at the side of a road or field, used esp. for supplying or removing water.
For a secret clearance in a national security position, the investigation requires agents to interview people who have lived or worked with the candidate at some point in the last seven (or more) years. There are four main types of security clearances for national security positions. These are confidential, secret, top secret (TS), and sensitive compartmented information (SCI).
A security clearance is a status granted to individuals allowing them access to classified information or to restricted areas, after completion of a thorough background check. The term security clearance is also sometimes used in private organizations that have a formal process to vet employees for access to sensitive information. A clearance by itself is normally not sufficient to gain access; the organization must also determine that the cleared individual needs to know specific information.