(noun, adjective, verb, interjection)


1. (informal) Dull; uninteresting; insipid.

- Well, the new restaurant seems nice, but their menu is a little blah.

2. (informal) Low in spirit or health; down.

- I decided to go exercise rather than sit around all day feeling blah.


1. An expression of mild frustration.

- Blah! Why can't I get this computer to work!

2. (When spoken repeatedly, often three times in succession: blah blah blah!) Imitative of idle, meaningless talk; used sometimes in a slightly derogatory manner to mock or downplay another's words, or to show disinterest in a diatribe, rant, instructions, unsolicited advice, parenting, etc. Also used when recalling and retelling another's words, as a substitute for the portions of the speech deemed irrelevant.

- Yeah, yeah, blah blah blah, Mom, you said this all yesterday.

- And then he was like, "Oh, my brother's an Internet millionaire, blah blah blah." Like I care!

3. Representing the sound of vomiting. See bleah, bleh.


1. pompous or pretentious talk or writing

Similar word(s): bombast, claptrap, fustian, rant

Definition categories: communication, grandiloquence, grandiosity, magniloquence, ornateness, rhetoric


1. (intransitive) To utter idle, meaningless talk.