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buy (something) sight unseen

To purchase something without seeing or examining it first. When I decided to buy a house sight unseen, I knew it would probably need a lot of repairs—and I was right!
See also: buy, sight, unseen

sight unseen

Without having ever seen or inspected the particular person or thing in question. In this country, it's not uncommon to be arranged to marry someone sight unseen. Only a fool would buy a car sight unseen.
See also: sight, unseen

what has been seen cannot be unseen

Disturbing or upsetting images are not easily forgotten. Even though I'm back from the battlefield now, what has been seen cannot be unseen.
See also: been, cannot, seen, unseen, what
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

buy something sight unseen

to buy something without seeing it first. I bought this land sight unseen. I didn't know it was so rocky. It isn't usually safe to buy something sight unseen.
See also: buy, sight, unseen
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

sight unseen

Without having viewed the object in question, as in He bought the horse sight unseen. This seeming oxymoron-how can a sight, which means something seen, be not seen?-dates from the late 1800s.
See also: sight, unseen
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

sight unˈseen

if you buy something sight unseen, you do not have an opportunity to see it before you buy it: We bought the table sight unseen and were pleased to find it was perfect for our kitchen.
See also: sight, unseen
Farlex Partner Idioms Dictionary © Farlex 2017

sight unseen

Without seeing the object in question: bought the horse sight unseen.
See also: sight, unseen
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

sight unseen

Without previous examination; taken on faith. This term, which implies accepting something without verification, dates from the late nineteenth century. The 1898 Yearbook of the United States Department of Agriculture stated, “The intelligent farmer of today has got beyond buying ‘sight unseen’ when it comes to fertilizer.”
See also: sight, unseen
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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References in periodicals archive ?
For a Muslim to stay within the folds of Islam, it is imperative to have faith in the unseen. Only then he can reach his potential in the world by opting for correct choices in life.
In addition, Scars Unseen will include interviews with subject professionals: medical, psychological, legal, and social professionals.
Critique: An inherently fascinating read from first page to last, "Visions of the Rapture and Unseen Realm" is an extraordinary account and one that is unreservedly recommended for anyone with an interest in Christian Metaphysics in general, and the Rapture in particular.
The programme will mark the 20th anniversary of the death of the Crimewatch presenter and will feature interviews with detectives, Ms Dando's colleagues, friends and close family, as well as previously unseen archive and photographs.
The probability of failure is higher than success because we are dealing with the unseen.
Jesus created all things, not just what is seen but what is unseen as well (Colossians 1:16).
Critique: The sequel to fantasy fiction author Stephen Merlino's first novel "The Jack of Souls" (9780986267406, $25.98 HC; $12.95 PB), his second novel in his 'The Unseen Moon' series, "The Jack of Ruin", continues a simply outstanding action/adventure fantasy series.
The Princess Leia star died in 2016, aged 60, but will appear in Episode IX using unseen footage from The Force Awakens.
LATE actress Carrie Fisher will return to fight the Dark Side in the next Star Wars film - using dramatic unseen footage.
Anti-slavery charity Unseen discovered 82 cases involving 297 potential victims of trafficking and exploitation based on calls and online reports to their UK-wide helpline.
Those parts of architecture which are somewhat out of our view are the subject of the upcoming exhibition by architect Charis Solomou, under the name 'Unseen Views'.
Pakistan Muslim League-Nawaz (PML-N) Senator Yaqoob Nasir on Friday claimed that some unseen forces" had played role in theremoval of Sanaullah Zehri as the chief minister of Balochistan.Speaking to Geo News, the PML-N senator said that those unseen forces could not even be identified.
St Paul had said, 'We fix our eyes not on what is seen, but on what is unseen; for what is seen is temporary, but what is unseen is eternal.' Spirituality apart, this holds good in many of our day-to-day activities.
An Unseen Angel takes readers though Alissa's complete journey, chronicling the moment-by-moment account of the day that began with every parent's worst nightmare: hearing, "There's been a shooting at your child's school." It follows her faith-filled spiritual path to coping, healing, forgiving, and eventually feeling gratitude for the life and love of her daughter Emilie.