1.
If you keep to a rule, plan, or agreement, you do exactly what you are expected or supposed to do.
You’ve got to keep to the speed limit...
= stick to
PHRASAL VERB : V P n
2.
If you keep to something such as a path or river, you do not move away from it as you go somewhere.
Please keep to the paths.
= stick to
PHRASAL VERB : V P n
3.
If you keep to a particular subject, you talk only about that subject, and do not talk about anything else.
Let’s keep to the subject, or you’ll get me too confused.
= stick to
PHRASAL VERB : V P n
4.
If you keep something to a particular number or quantity, you limit it to that number or quantity.
Keep costs to a minimum.
PHRASAL VERB : V n P n