One of Lit Hub's "Most Anticipated Books of 2025"
One of Marie Claire's Best New Books of Autumn 2025
One of PEOPLE's Best Books of December 2025

"Greene's rich, elliptical, beautifully written novel performs a similar feat, refusing to be pinned down and defying easy definition to the very last page. A masterclass in storytelling and what it is to be human."
--Marie Claire, Best New Books of Autumn 2025

"Brilliant and revelatory . . . The story is thoroughly satisfying, as controlled and complete as a perfectly crafted sentence."
--Shelf Awareness (starred review)

"The Definitions is utterly haunting in its precision, as Matt Greene sharpens every sentence to near perfections."
--Chicago Review of Books, Must-Read Books of December 2025

"Greene's novel belongs to a lyrical tradition in the vein of Never Let Me Go. . . . An elliptical and unsettling entry into the canon of contemporary dystopias."
--Kirkus

"Thought-provoking and smart, one that's sure to play on your mind."
--The Express (UK), Best Books to Read in October 2025

"Greene delivers a weighty metaphysical and metafictional novel. . . . Readers will find much to ponder."
--Publishers Weekly

"A thrilling novel that asks profound questions about love and language, selfhood and memory. One of those books that you want to read again as soon as you've finished, it consoles even as it frightens, appalls even as it reveals how much we have to treasure. It has earned its place on my shelf of favorite science fiction, alongside Ishiguro, Ravn, Butler, and Chiang."
--Louisa Hall, author of Speak and Reproduction

"An unnerving story of our ominous present era huddled in a cloak of post-apocalyptic speculation, Matt Greene's The Definitions digs--and digs hard--into the nature of language, of reality, of what we can and must not believe about what we're told about ourselves and our world. It's harrowingly well constructed, revealing its secrets in a series of icy, controlled detonations, and thoroughly earns the sense of heartbreak I'm sure you'll feel at its finale. As I was reading I thought I detected glimpses of Ray Bradbury, of H. G. Wells and George Orwell, even of Lewis Carroll, but The Definitions is very much its own creature, and I am in awe of Greene's taut, shiversome eloquence."
--Benjamin Dreyer, New York Times bestselling author of Dreyer's English

"A novel pulsing with intelligence and razor-edged with wit. Matt Greene's The Definitions probes the vulnerabilities of human memory, exposing the extent to which identity is forged by language and the landfill of pop culture. No one should forget to read this book before the end times come. "
--Benjamin Wood, author of Seascraper, longlisted for the 2025 Booker Prize

"Deceptively gentle and ultimately devastating, The Definitions holds a delicate line between giving us enough to be utterly compelling and quietly paring back enough to keep us guessing. The Center, the narrator and the drifting language will haunt my thoughts, and my words, for some time."
--Han Smith, author of Portraits at the Palace of Creativity and Wrecking, shortlisted for the 2024 Goldsmiths Prize

"A slippery, sinister treat of a novel, with a tender heart. Like the innocent inmates of this enigmatic facility, Matt Greene plays constant, original games with words, meanings and memory; unlike them, he is in complete control. An unnerving, compelling delight, somewhere between Severance and Never Let Me Go."
--Will Wiles, author of Care of Wooden Floors and Plume

"A tense, unsettling, superbly-woven fable. A stirring ode to how bravely we fight to find ourselves after immense loss."
--Musa Okwonga, author of In The End It Was All About Love

"A terrifying glimpse at what happens when language, self and memory are taken from us. Shimmers with intelligence, terror and deep humanity."
―Ben Pester, author of The Expansion Project and Am I in the Right Place?