Pronunciation: (u-lōn'),[key] —adj.(used predicatively)
1. separate, apart, or isolated from others: I want to be alone. 2. to the exclusion of all others or all else: One cannot live by bread alone. 3. unique; unequaled; unexcelled: He is alone among his peers in devotion to duty. 4. leave alone, a. to allow (someone) to be by himself or herself: Leave him alone--he wants to rest. b. to refrain from annoying or interfering with: The youngsters wouldn't leave the dog alone, and he finally turned on them. 5. let alone, a. to refrain from annoying or interfering with.
b. not to mention: He was too tired to walk, let alone run. 6. let well enough alone, to be satisfied with the existing situation; refrain from attempting to change conditions: Marriages are often destroyed by relatives who will not let well enough alone.
—adv. 1. solitarily; solely: She prefers to live alone. 2. only; exclusively.
3. without aid or help: The baby let go of the side of the crib and stood alone.