形容词

1. 明显的；显然的；无疑的
If something is obvious, it is easy to see or understand.

2. 不必要的;无新意的；缺乏想象力的
If you describe something that someone says as obvious, you are being critical of it because you think it is unnecessary or shows lack of imagination.

1. easily perceived by the senses or grasped by the mind

e.g. obvious errors