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buy into (something)
1. To make a financial investment in a business or similar venture. I refuse to buy into my brother's latest scheme because I highly doubt it will ever make a penny—let alone millions.
2. To believe in and support an idea, concept, or system. Rod's a good enough coach, but he just can't get the players to buy into his system. We can't approach the CEO with our idea for overhauling the computer system until we get our boss to buy into it first.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Purchase a membership, a share, or an interest in something. For example, I'd love to buy into this partnership, but I can't afford it. [First half of 1600s]
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.
1. To acquire a stake or interest in something, especially a business or organization: I bought into a risky real estate venture, and fortunately I didn't lose any money.
2. To believe in something, especially wholeheartedly or uncritically: I can't buy into your brand of politics.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
buy into, to
To believe in, to take for real. This phrase transfers the purchasing of a membership or stake in something to an uncritical acceptance. The British newspaper Telegraph headlined an article by Jenny McCartney that criticized the former British prime minister’s awards and other accolades, “Why Does the World Buy into Tony Blair?” (July 3, 2010).
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer