1. [adv]  without any others being included or involved; "was entirely to blame"; "a school devoted entirely to the needs of problem children"; "he works for Mr. Smith exclusively"; "did it solely for money"; "the burden of proof rests on the prosecution alone"; "a privilege granted only to him"
2. [adv]  without anybody else; "the child stayed home alone"; "he flew solo"

ALONE is a 5 letter word that starts with A.

1. \A*lone"\, a. [All + one. OE. al one all allone, AS. [=a]n
   one, alone. See {All}, {One}, {Lone}.]
   1. Quite by one's self; apart from, or exclusive of, others;
      single; solitary; -- applied to a person or thing.
            Alone on a wide, wide sea.            --Coleridge.
            It is not good that the man should be alone. --Gen.
                                                  ii. 18.
   2. Of or by itself; by themselves; without any thing more or
      any one else; without a sharer; only.
            Man shall not live by bread alone.    --Luke iv. 4.
            The citizens alone should be at the expense.
                                                  --Franklin.
   3. Sole; only; exclusive. [R.]
            God, by whose alone power and conversation we all
            live, and move, and have our being.   --Bentley.
   4. Hence; Unique; rare; matchless. --Shak.
   Note: The adjective alone commonly follows its noun.
   {To} {let or leave} {alone}, to abstain from interfering with
      or molesting; to suffer to remain in its present state.
   

2. \A*lone"\, adv.
   Solely; simply; exclusively.