vacant

As an adjective vacant

is not occupied; empty.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As adjectives the difference between subject and vacant

is that subject is likely to be affected by or to experience something while vacant is not occupied; empty.

As a noun subject

is (label) in a clause: the word or word group (usually a noun phrase) that is dealt with in active clauses with verbs denoting an action, the subject and the actor are usually the same.

As a verb subject

is to cause (someone or something) to undergo a particular experience, especially one that is unpleasant or unwanted.

As a noun unite

is unity.

As an adjective vacant is

not occupied; empty.

As adjectives the difference between vacant and undefined

is that vacant is not occupied; empty while undefined is lacking a definition or value.

As adjectives the difference between vacant and vacant

is that vacant is not occupied; empty while vacant is not occupied; empty.

Vacant is a related term of sluggish.

As adjectives the difference between vacant and sluggish

is that vacant is not occupied; empty while sluggish is habitually idle and lazy; slothful; dull; inactive; as, a sluggish man.

As adjectives the difference between vacant and false

is that vacant is not occupied; empty while false is untrue, not factual, factually incorrect.

As a noun false is

one of two options on a true-or-false test.

As an adverb false is

not truly; not honestly; falsely.