A remark expressing surprise, delight, pain, anger, or other strong emotion, often spoken with extra force of emphasis: How wonderful!
In writing, exclamations are often shown by the use of an exclamation mark. Exclamation sentences can have a special grammatical construction, which involves changing the normal sentence order and starting the sentence in one of two ways:
 The sentence begins with how+Adjective:
How strange it looked from below!
 The sentence begins with what+Noun Phrase:
What an incredible confidence trick the election polls have turned out to be.
In speech particularly, exclamations frequently contain no verb:
How stupid of me!
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