headache

noun

head·​ache ˈhed-ˌāk 

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

ˈhed-ˌā-kē 

Synonyms

• job
• killer
• burden
• effort

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

Symptoms usually appear three to seven days after being bitten and include fever, joint pain, headache, muscle pain, swelling or skin rash. —Miami Herald, 3 Oct. 2025

Take the headache out of toy assembly and be prepared with 40-pack batteries at-the-ready for $2 off. —Kait Hanson, Southern Living, 3 Oct. 2025

More than just pretty light shows For satellites, navigation systems and communication technologies, these geomagnetic storms can be quite the headache. —Daisy Dobrijevic, Space.com, 3 Oct. 2025

License activation can also cause headaches if the software is tied to the old machine, so always deactivate before reinstalling. —Kurt Knutsson, FOXNews.com, 3 Oct. 2025

Word History

First Known Use

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

Phrases Containing headache

• cluster headache
• ice-cream headache
• pre-headache
• sick headache
• splitting headache
• tension headache

Rhymes for headache

• awake
• backache
• beefsteak
• betake
• cheesecake
• cupcake
• daybreak
• earthquake
• eastlake
• forsake
• handshake
• heartache

Video

An Abbreviated History of American English Spelling

Soop, wimmen, and headake did not make the cut

Kids Definition

headache

noun

head·​ache ˈhed-ˌāk 

1

: pain in the head

2

: an annoying or baffling situation or problem

headachy

-ˌā-kē 

adjective

Medical Definition

headache

noun

head·​ache ˈhed-ˌāk 

: pain in the head

called also cephalalgia

headachy

-ˌā-kē 

adjective