Definition of tooth
plural teeth
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\ˈtēth\
1 a
: one of the hard bony appendages that are borne on the jaws or in many of the lower vertebrates on other bones in the walls of the mouth or pharynx and serve especially for the prehension and mastication of food and as weapons of offense and defense
b
: any of various usually hard and sharp processes especially about the mouth of an invertebrate
2
: a projection resembling or suggesting the tooth of an animal in shape, arrangement, or action
- a saw tooth
a
: any of the regular projections on the circumference or sometimes the face of a wheel that engage with corresponding projections on another wheel especially to transmit force : cog
b
: a small sharp-pointed marginal lobe or process on a plant
3 a
teeth plural
: effective means of enforcement
- drug laws with teeth
b
: something that injures, tortures, devours, or destroys
- jealousy with rankling tooth
- —Thomas Gray
5
: a roughness of surface produced by mechanical or artificial means
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in the teeth of
1
: in or into direct contact or collision with
- sailing in the teeth of a hurricane
- —Current Biography
2
: in direct opposition to
- rule had … been imposed by conquest in the teeth of obstinate resistance
- —A. J. Toynbee
