Meaning of “disappear” - Learner’s Dictionary

disappear

verb [ I ] uk us /ˌdɪsəˈpɪər/
NOT SEE

B1 to become impossible to see:

She watched him disappear into the crowd.
GO

B1 to suddenly go somewhere and become impossible to find:

Her husband disappeared in 1991.
STOP EXISTING

B2 to stop existing:

These flowers are disappearing from our countryside.
disappearance uk us /ˌdɪsəˈpɪərəns/ noun [ C, U ]

B2

Police are investigating the girl's disappearance.

See also

(Definition of “disappear” from the Cambridge Learner’s Dictionary © Cambridge University Press)