headache

Definition of Headache in English :

1. concern, headache, vexation, worry

something or someone that causes anxiety; a source of unhappiness

Example Sentences:
'New York traffic is a constant concern'
'it's a major worry'

pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs

WordNet Lexical Database for English. Princeton University. 2010.

Headache

noun

1.

pain in the head, caused by dilation of cerebral arteries, muscle contraction, insufficient oxygen in the cerebral blood, reaction to drugs, etc

. Technical name: cephalalgia

2. informal

any cause of worry, difficulty, or annoyance

noun

1.

a continuous pain in the head

2. US, Informal

a cause of worry, annoyance, or trouble

n.

1. A pain in the head.

2. Informal Something, such as a problem, that causes annoyance or trouble.