Superfluous is an adjective that qualifies something that is expendable, unnecessary or of little importance. The superfluous can also refer to everything that can be discarded, that is leftover or is surplus and extravagant.
It is common to use the word superfluous to refer to items that are expensive or considered luxury. The word can also be used to refer to people who are considered shallow or superb.
Many people have doubts about the spelling of the word, between superfluous and "superfluous". The correct form is superfluous.
See the meaning of superb.
The term can be used to refer to things that are considered extravagant or that are far more than what is considered sufficient.
It is a masculine adjective that originated from Latin superfluous and means "excessive".
They are synonymous with superfluous: unnecessary, expendable, futile, superficial, surplus, useless. The main antonyms of superfluous are: essential, necessary, surplus and indispensable.
See also the meaning of required and futile.