Deep thought or consideration.
The act of ruminating; i.e. chewing cud.
Negative cyclic thinking; persistent and recurrent worrying or brooding.
An eating disorder characterized by repetitive regurgitation of small amounts of food from the stomach.
Empty space.
An available room in a hotel; guest house, etc.
An unoccupied position or job.
Lack of intelligence or understanding.
A blank mind, unoccupied with thought.
A defect in a crystal caused by the absence of an atom in a lattice