What is the meaning of only?

adjective

• Being the only one; single and isolated from others.
  • usage: "the lone doctor in the entire county"; "a lonesome pine"; "an only child"; "the sole heir"; "the sole example"; "a solitary instance of cowardice"; "a solitary speck in the sky"
  • synonyms: lone, lonesome, sole, solitary
• Exclusive of anyone or anything else.
  • usage: "she alone believed him"; "cannot live by bread alone"; "I'll have this car and this car only"
  • synonyms: alone

adverb

• And nothing more.
  • usage: "I was merely asking"; "it is simply a matter of time"; "just a scratch"; "he was only a child"; "hopes that last but a moment"
  • synonyms: merely, simply, just, but
• Without any others being included or involved.
  • usage: "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"
  • synonyms: entirely, exclusively, solely, alone
• With nevertheless the final result.
  • usage: "He arrived only to find his wife dead"; "We won only to lose again in the next round"
• In the final outcome.
  • usage: "These news will only make you more upset"
• Except that.
  • usage: "It was the same story; only this time she came out better"
• Never except when.
  • usage: "call me only if your cold gets worse"
  • synonyms: only if, only when
• As recently as.
  • usage: "I spoke to him only an hour ago"