someone's one and only

one and only

1. adjective A phrase used when introducing someone to emphasize that they are famous and uniquely talented. It gives me great pleasure to welcome the one and only Oprah!
2. noun One's only true love. Of course I'll stay true to you while I'm gone—you're my one and only!
See also: and, one

someone's one and only

someone's one true love. informal
See also: and, one
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