Learner's definition of TOOTH
1 [count] : one of the hard white objects inside the mouth that are used for biting and chewing
The dentist will have to pull that tooth.
You should brush/clean your teeth every morning and night.
She clenched her teeth in anger.
He has a set of false teeth.
a loose tooth
She sank her teeth into [=bit] the apple.
2 [count] : a sharp or pointed object that sticks out of something and is part of a row of similar objects 3 teeth [plural] : the power that makes something effective
an eye for an eye and a tooth for a tooth
by the skin of your teeth
cut a tooth, cut your teeth
get/take the bit between your teeth
get your teeth intoor chiefly USsink your teeth into
: to become fully involved in (something, such as a new activity): to do or deal with (something) with a lot of energy, interest, etc.
in the teeth of
orinto the teeth of: directly against (a strong wind, storm, etc.)
like pulling teeth
— used to say that something is very difficult and frustrating
long in the toothinformal
set your teeth on edge
◊ If a sound, taste, etc., sets your teeth on edge, it makes your body feel tense or uncomfortable.
tooth and nail
: with a lot of effort and determination