ALO'NE, adjective [all and one.]
1. Single; solitary; without the presence of another; applied to a person or thing.
It is not good that man should be alone Genesis 2:18.
[This adjective follows its noun.]
2. It is applied to two or more persons or things, when separate from others, in a place or condition by themselves; without company.
And when they were alone he expounded all things to his disciples. Mark 4:10.
Thou whose name alone is Jehovah. Psalms 83:18.
This sense at first appears to be adverbial, but really is not; whose name single, solitary, without another, is Jehovah.
To let alone is to suffer to rest; to forbear molesting or meddling with; to suffer to remain in its present state. alone in this phrase, is an adjective, the word to which it refers being omitted; let me alone; let them alone; let it alone; that is, suffer it to be unmolested, or to remain as it is, or let it remain by itself.
ALO'NE, adverb Separately; by itself.