unmistakably (`plain' is often used informally for `plainly')
"the answer is obviously wrong"
"she was in bed and evidently in great pain"
"he was manifestly too important to leave off the guest list"
"it is all patently nonsense"
"she has apparently been living here for some time"
"I thought he owned the property, but apparently not"
"You are plainly wrong"
"he is plain stubborn"
In an obvious or clearly apparent manner.
"Her anger was obviously visible on her face as she slammed the door shut."
In plain English: Obviously means something is so clear that everyone can see it without any doubt.
"Obviously, the meeting was cancelled because everyone went home early."
Usage: Use obviously to describe actions or situations that are so clear they can be seen without doubt. Avoid using it at the start of sentences to express personal agreement, as this often sounds condescending in conversation.
The word obviously comes from combining the adjective obvious with the suffix -ly to form an adverb. It entered English simply by adding a common grammatical ending to describe something that is clearly seen or understood.