The most common mood in English is the indicative.
More Examples
Used in the Middle of Sentence
He's in a bad mood today, so you might want to tread lightly if you talk to him.
The mean boss would have mercy on the marginally performing employee, except he was in a foul mood today and decided to say what he really thought of her.
Her wild mood swings displayed the natures of her multiple personalities.
Meaning of mood for the defined word.
Grammatically, this word "mood" is a noun, more specifically, a countable noun.