Silently; in the thoughts; without making a sign that others can see; secretly.
Bill laughed to himself when John fell down.
Mary said to herself that Joan was prettier than Ann.
Tom thought to himself that he could win.
Without telling others; in private; as a secret. Used after keep.
John knew the answer to the problem, but he kept it to himself.
Mary keeps her affairs to herself.
Without company; away from others; alone; deserted.
The boys went home and John was left to himself.
When Mary first moved to her new neighborhood she was very shy and kept to herself.
Following one's own beliefs or wishes; not stopped by others.
The teacher left Mary to herself to solve the problem.
When John insisted on going, Fred left him to himself.