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Synonyms

blab

American  
[blab] / blæb /
Also blabber

verb (used with object)

blabbed, blabbing
  1. to reveal indiscreetly and thoughtlessly.

    They blabbed my confidences to everyone.


verb (used without object)

blabbed, blabbing
  1. to talk or chatter indiscreetly or thoughtlessly.

    Don't confide in him, because he blabs. She blabbed so much I couldn't hear the concert.

noun

  1. idle, indiscreet chattering.

  2. a person who blabs; blabbermouth.

blab British  
/ blæb /

verb

  1. to divulge (secrets) indiscreetly

  2. (intr) to chatter thoughtlessly; prattle

"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

noun

  1. a less common word for blabber blabber

"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

Other Word Forms

  • blabbing noun

Etymology

Origin of blab

1325–75; Middle English blabbe (noun), perhaps back formation from blaberen to blabber; cognate with Old Norse blabbra, German plappern

Explanation

To blab is to gossip about or reveal a secret you promised to keep. You might accidentally blab to your dad about your brother getting in trouble at school. A reporter could take you by surprise and get you to blab about your movie star neighbor, and it might be hard for a little kid not to blab about the birthday gift he's giving his sister. Another way to blab is simply to talk a lot: "I sat there and listened to him blab about all the famous people he knows." Blab comes from the Middle English blabbe, "one who does not control his tongue."

Keep Reading on Vocabulary.com

Vocabulary lists containing blab

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

I was probably about 2 or 3 then, just trying to blab, because the early nurses I had when I was a kid had said that I had delayed speech or something called “selective mutism.”

From Los Angeles Times • Sep. 19, 2025

But like in past seasons for tax filing, popular online tax services from TurboTax and H&R Block want to blab your tax return secrets.

From Washington Post • Apr. 11, 2023

"All the 'career prosecutors' I know would never ever blab to a reporter about an ongoing case," tweets lawyer Tristan Snell.

From Salon • Sep. 23, 2022

‘I just had to blab it all out there,” Jenny Lewis says, with a sigh.

From The Guardian • Mar. 22, 2019

And just as naturally, they find the nearest person and blab.

From "Linked" by Gordon Korman