I think you mean like here to mean about, in which case it's an adjective
adverb meaning approximately
Interjection
The word "minutes" is a plural noun.
Objective noun.
Yes idioms are somesort of figure of speech. Something like "In a jam" would be one of those.
The word ah is an interjection. It is an expression of relief or comfort.
Stunned is a verb (past tense of stun) and an adjective (a stunned expression).
The word hallelujah is an interjection. It is an expression of gratitude usually used in songs of praise.
Twenty five is a noun.
Expression is a noun.
noun
noun