Definition of contains:
(v) :
(transitive) To hold inside.
(v) :
(transitive) To include as a part.
(v) :
(transitive) To put constraints upon; to restrain; to confine; to keep within bounds.
(v) :
(mathematics, of a set etc., transitive) To have as an element or subset.
(v) :
(obsolete, intransitive) To restrain desire; to live in continence or chastity.