adjective
not used before a noun
without anyone or anything else :not involving or including anyone or anything else :separate from other people or things
without people that you know or that usually are with you
If you are not alone when you do something, you are not the only person who is doing it.
[more ~; most ~] :feeling unhappy because of being separated from other people
adverb
without help from anyone or anything else
without another - used for emphasis
without including or needing anything more
go it alone
to do something by yourself
leave (someone or something) alone
leave well enough alone
let alone
stand alone