headache

noun

head·​ache ˈhed-ˌāk How to pronounce headache (audio)
Synonyms of headachenext
1
: pain in the head
2
: a vexatious or baffling situation or problem
… meetings had become a giant headache.Franklin Foer
headachy adjective
or less commonly headachey

Examples of headache in a Sentence

I'm starting to get a headache. The symptoms include fever and headache. The city's biggest headache is traffic. Managing your finances can be a real headache.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The first signs of infection are non-specific and include flu-like symptoms like fever, headaches, muscle pain, vomiting and sore throat. Michal Ruprecht, CNN Money, 30 Jan. 2026 Abruptly stopping caffeine can cause withdrawal symptoms, such as a withdrawal headache. Angela Ryan Lee, Verywell Health, 30 Jan. 2026 Unfortunately, there’s nothing quite like the headache of realizing your travel documents aren’t in order. Brittany Chang, Condé Nast Traveler, 30 Jan. 2026 With Frimpong sidelined, Conor Bradley out for the rest of the season with a knee injury and Joe Gomez still hampered by a hip problem, Slot has a major headache at right-back. James Pearce, New York Times, 30 Jan. 2026 See All Example Sentences for headache

Word History

First Known Use

before the 12th century, in the meaning defined at sense 1

Time Traveler
The first known use of headache was before the 12th century

Browse Nearby Words

Cite this Entry

“Headache.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/headache. Accessed 3 Feb. 2026.

Kids Definition

headache

noun
head·​ache ˈhed-ˌāk How to pronounce headache (audio)
1
: pain in the head
2
: an annoying or baffling situation or problem
headachy adjective

Medical Definition

headache

noun
head·​ache ˈhed-ˌāk How to pronounce headache (audio)
: pain in the head

called also cephalalgia

headachy adjective

More from Merriam-Webster on headache

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster