Learner's definition of VISIBLE
[more visible; most visible]
1 : able to be seen
The ship was not visible through the fog.
The ship was barely/clearly visible.
The patient showed no visible symptoms.
stars visible to the naked eye [=able to be seen without special equipment]
2 : easily seen or understood : obvious
There was a visible change in his mood.
She has no visible means of support. [=she had no obvious source of money, such as a job]
3 : known to or noticed by the public