Why does "I wake up in the morning." sound better than "I wake up in morning"? [closed]

I'm confused because some of my friend said the latter while I use the former.


The only correct form is the one with the definite article.

Just look at this.

It can be explained by the rule of using the definite article with the only thing.

As there is only one morning in the day we must use 'the'.

No article is used with singular forms of countable nouns only in set-up expressions and idioms (by bus, on foot, etc.).