No, it is a plural noun used as a collective term (man of means, no means of support). The word mean can be used as an adjective with several varied definitions.
It can be an adjective or adverb. As an adjective it means of or befitting a queen.
It means a colour as an adjective
"Still" is an adjective when it means "not moving."
An adjective that means adequate to accomplish a purpose is sufficient.
The adjective you are looking for is "swift" which means done or moving quickly.
a adjective can mean you are tring to achieve a target
The adjective is wild.
Yes, it is an adjective. It means unspoken, or understood.
It changes an adjective to a superlative adjective.
Yes, it is an adjective. It means bright or shining.
Yes, it is an adjective. It means not helpful at all.
Yes, it is an adjective. It means unclear or indistinct.