The word 'today' functions as an adverb and a noun. Examples:
Adverb: The auditor is expected today.
Noun: Today is the day of the audit. No.
Today is a noun in that sentence.
An adverb.
"Today" is an adverb. It is used to modify verbs, adjectives, or other adverbs by providing information about time.
It helps to turn it into a statement. It would then be: She is receiving visitors today. This would make she the subject.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.