Platonic solid

“This will take a lot of solid negotiating,” says Mark Schneider of the International Crisis Group.
Meet America’s Next Ambassador to Cuba|Eleanor Clift|December 18, 2014|DAILY BEAST
By nightfall, I had showered, eaten some soup that a friend brought me, and I slept in my room for 12 solid hours.
I Was Gang Raped at a UVA Frat 30 Years Ago, and No One Did Anything|Liz Seccuro|December 16, 2014|DAILY BEAST
So there is nothing wrong with using the charms of, say, Parks and Recreation, to create some solid bonding time.
Binge Watching is the New Bonding Time|The Daily Beast|December 10, 2014|DAILY BEAST
But I'm pretty solid in the knowing that he's disgusted by that.
The Chris Brown vs. Drake Feud Continues: Brown Claims Ex GF Karrueche Tran Cheated with Drizzy|Marlow Stern|December 7, 2014|DAILY BEAST

Now, the Memphis congressman is one of only a handful of white Southerners in his caucus and the once Solid South is deep red.
Southern Dems Won’t Rise Again|Ben Jacobs|December 5, 2014|DAILY BEAST
When it cleared, the valley was a solid expanse of white, and the stars shone out as if in an Arctic sky.
Ramona|Helen Hunt Jackson
I hope the French Government will recognize this dashing stroke of d'Amade's by something more solid than a thank you.
Gallipoli Diary, Volume I|Ian Hamilton
But it was neither his talents as a diplomatist, nor his remarkable mind, nor his solid erudition, which made Nicot immortal.
Tobacco; Its History, Varieties, Culture, Manufacture and Commerce|E. R. Billings.
True, she had taken a lively interest in all her brother's curates, but it was always a professional interest and purely Platonic.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills
Black Sheep was sent to the drawing-room and charged into a solid tea-table laden with china.
Kipling Stories and Poems Every Child Should Know, Book II|Rudyard Kipling

British Dictionary definitions for Platonic solid

Platonic solid

noun

any of the five possible regular polyhedra: cube, tetrahedron, octahedron, icosahedron, and dodecahedronAlso called (esp formerly): Platonic body

Word Origin for Platonic solid

C17: named after Plato 1, who was the first to list them

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012