<p><strong>Adjective</strong></p><ul><li>separate, apart, or isolated from others: I want to be alone.</li><li>synonyms: unattended, unaccompanied, solitary, single.</li><li>to the exclusion of all others or all else: One cannot live by bread alone.</li><li>unique; unequaled; unparalleled: He is alone among his peers in devotion to duty.</li></ul><p><strong>Adverb</strong></p><ul><li>solitarily; solo: She prefers to live alone.</li><li>only; exclusively: You alone hold the key to your happiness.</li><li>without aid or help: The baby let go of the side of the crib and stood alone.</li></ul>