Definition of "Only" :
adjective: exclusive of anyone or anything else
"I'll have this car and this car only."
adjective: being the only one; single and isolated from others
"An only child."
adverb: and nothing more
"He was only a child."
adverb: without any others being included or involved
"A privilege granted only to him."
adverb: with nevertheless the final result
"He arrived only to find his wife dead."
adverb: in the final outcome
"These news will only make you more upset."
adverb: as recently as
"I spoke to him only an hour ago."
adverb: except that
"It was the same story; only this time she came out better."
adverb: never except when
"Call me only if your cold gets worse."