Dictionary.info
BROWSE DICTIONARY
BROWSE DICTIONARY
IELTS Words
TOEFL Words
GRE Words
SAT Words
GMAT Words
English Learning
Learning
IELTS Lessons
Exam English ✓
Graduate tests
Test English Info
Oxford Collocation Dictionary
Wordnet Online
IELTS Lessons
Google Dictionary
DEFINITIONS
SYNONYMS
Search
top definitions
Q clearance
noun
(in the Nuclear Regulatory Commission) the highest level of security clearance, permitting access to secret information, documents, etc., relating to nuclear research.