phrasal
1.
a. : to confine oneself to : remain in : not leave
kept to the house during his convalescence
kept to the main roads in his travels
b. : to limit oneself to (as a particular kind of diet)
2. : to abide by
keep to the rules of the game
: conform to
keep to the hour decided on — Agnes M. Miall
: not deviate from
keep to the point