Longman Dictionary of Contemporary English homepage

Date: 1900-2000
Origin: blue chip 'blue counter of high value used in gambling' (1900-2000)

blue chip

 adjective
     
blue chip
BFSBBC

blue-chip companies/shares etc

companies or shares that make a profit and are considered safe
—blue chip noun [countable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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