/ kənˈteɪn; NAmE / verb [ vn ] (not used in the progressive tenses)
1.
if sth contains sth else, it has that thing inside it or as part of it :
This drink doesn't contain any alcohol.
Her statement contained one or two inaccuracies.
a brown envelope containing dollar bills
The bottle contains (= can hold) two litres.
2.
to keep your feelings under control
SYN restrain :
She was unable to contain her excitement.
I was so furious I just couldn't contain myself (= I had to express my feelings) .
3.
to prevent sth harmful from spreading or getting worse :
to contain an epidemic
Government forces have failed to contain the rebellion.
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WORD ORIGIN
Middle English : from Old French contenir , from Latin continere , from con- altogether + tenere to hold.