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  • ach
    ach
    interjection
    alas; oh.
  • ACH
    ACH
    abbreviation
    automated clearing houseclearinghouse: a large computer network that transfers batches of electronic funds directly between financial institutions without the use of cash, credit cards, or paper checks, thus reducing fees and enabling faster transactions, such as for recurring bill payments, direct deposit, etc.
  • ACh
    ACh
    abbreviation

ach

1 American  
[ahkh] / ɑx /

interjection

German.
  1. alas; oh.


ACH 2 American  

abbreviation

  1. automated clearing houseclearinghouse: a large computer network that transfers batches of electronic funds directly between financial institutions without the use of cash, credit cards, or paper checks, thus reducing fees and enabling faster transactions, such as for recurring bill payments, direct deposit, etc.

  2. Automated Clearing House Network: the national computer network for processing electronic funds transfers between financial institutions in the United States.


ACh 3 American  

abbreviation

Biochemistry.
  1. acetylcholine.


ach British  
/ ɑːx /

interjection

  1. Also: och. an expression of surprise, impatience, disgust, etc

"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

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.

See Examples For:

“I would just love to take every ach and pain his heart and mind has to endure. Holding him tight as I say everything is gonna eventually be better then now.”

From Washington Post ● Feb. 19, 2020

Reforming and rehabilitating them, ach, less bothered about that.

From The Guardian ● Apr. 23, 2017

The man in the street may claim to oppose unconditional aid to Pyongyang, but he has little stom ach for tension.

From Newsweek ● Apr. 15, 2013

Russell to the net, stretching volley… ach, framed into the tape.

From BBC ● Jun. 20, 2011

The following is rather dubious: "If chance once in the spring his head should ach, It was foretold: thus says my almanack."

From Notes and Queries, Number 185, May 14, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. by George Bell

Gruber said the town next called Alyssa Bowker’s mobile phone and left a message about the ACH transfer, but no one called back.

From The Wall Street Journal ● Jul. 21, 2026

But town Finance Director Melanie Gruber said the ACH form didn’t raise suspicions.

From The Wall Street Journal ● Jul. 21, 2026

Letting users revoke ACH access — which stops automatic bank withdrawals — at any time is one of the things that differentiates cash-advance apps from traditional lenders.

From MarketWatch ● Feb. 12, 2026

Similar protection services are offered for ACH or transactions that are debited directly from a business bank account.

From New York Times ● Jan. 7, 2024

ACH, I tell you, she look like the Frau Tellamantez, some-thing.

From The Song of the Lark by Willa Sibert Cather

As ACh binds at the motor end plate, this depolarization is called an end-plate potential.

From Textbooks ● Jun. 9, 2022

All preganglionic fibers, both sympathetic and parasympathetic, release ACh.

From Textbooks ● Jun. 19, 2013

Postganglionic sympathetic fibers release norepinephrine, with a minor exception, whereas postganglionic parasympathetic fibers release ACh.

From Textbooks ● Jun. 19, 2013

In skeletal muscles, ACh receptors are initially present along most of the surface of the myoblasts, but spinal nerve innervation causes the release of growth factors that stimulate the formation of motor end-plates and NMJs.

From Textbooks ● Jun. 19, 2013

The postganglionic connections to sweat glands in the skin and blood vessels supplying skeletal muscle are, however, exceptions; those fibers release ACh onto muscarinic receptors.

From Textbooks ● Jun. 19, 2013

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