Definition of "spell out"

spell out

verb
third-person singular simple present spells out, present participle spelling out, simple past and past participle spelled out or (mostly UK) spelt out
1. (transitive) To form (a word) from letters; say the letters in a word.
2. (transitive, when writing or editing) To replace an acronym with its expansion.
3. (transitive) To explain in clear and simple terms; to be explicit.
  Quotations
  Dany has never had a full vision for what happens once she obtains the Iron Throne, but that’s what her advisors, including Tyrion and Varys, are for. And the show has never exactly spelled out Jon’s platform beyond “stay alive,” so he’d also require a small council.
  2019 May 5, Danette Chavez, “Campaigns are Waged On and Off the Game Of Thrones Battlefield (Newbies)”, in The A.V. Club‎, archived from the original on 28 January 2021
  Last weekend, President Biden’s national security adviser, Jake Sullivan, responded that any nuclear weapon use would result in “catastrophic consequences” for Russia, adding that in private communications with Moscow, the United States had “spelled out” how America and the world would react.
  2022 October 1, David E. Sanger, Anton Troianovski, Julian E. Barnes, “In Washington, Putin’s Nuclear Threats Stir Growing Alarm”, in The New York Times‎