Having all its flight feathers and ready to fly(adjective)
Having reached maturity(adjective)
Having reached full rank or status(adjective)
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Use "fully-fledged" in a sentence
"And third, some emerging markets, in spite of IMF help, may have a fully-fledged financial crisis."
"By 15, I was a fully-fledged addict and alcoholic and once beat the members of our local football team in a drinking competition."
"As part of a complex agreement signed in August 2009 to forge a joint company, Europe's largest auto maker and Porsche's holding firm mutually granted each other put and call options for a possible slice of Porsche's sports-car business if the decision on a fully-fledged merger couldn't be reached by the end of 2011 as initially planned."