Definition of open one's mouth
- He says something stupid every time he opens his mouth.
: having no enclosing or confining barrier : accessible on all or nearly all sides
: being in a position or adjustment to permit passage : not shut or locked
: having a barrier (such as a door) so adjusted as to allow passage
: to move (something, such as a door) from a closed position
: to make available for entry or passage by turning back (something, such as a barrier) or removing (something, such as a cover or an obstruction)
: to make available for or active in a regular function
: open and unobstructed space: such as
: open air
: the natural opening through which food passes into the body of an animal and which in vertebrates is typically bounded externally by the lips and internally by the pharynx and encloses the tongue, gums, and teeth
: an individual requiring food
: speak, pronounce
: to utter bombastically : declaim
: to repeat without comprehension or sincerity
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