1
a
: the quality or state of being isolated : detachment, loneliness
writing letters … to fellow artists in order to counteract the soul-destroying separateness that he felt had caused the poet's death—New Republic
b
: the quality or state of being exclusive or excluded : aloofness, segregation
the separateness of classes entrenched … by the force of law and custom—Oscar Handlin separateness which denies each group enriching contact with others—C. H. Nichols
2
: distinctive character : individuality
it is the separateness of the films that gives the program its strength—Cecile Starr
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Merriam-Webster unabridged