hey

The word “hey” means an informal way to greet someone or get their attention. In plain terms, a casual word for saying hi or making someone notice you.

“Hey” is pronounced hay (/heɪ/ in IPA).

Here is “hey” used in a sentence: “"Hey, over here!" she shouted across the platform.”

Words with a similar meaning to “hey” include yo, gee whiz, yowzah, howdy, wotcher and ahem.

“Hey” is an interjection.

The word “hey” comes from Middle English. From Middle English "hey"/"hei," an ancient exclamation found in a similar form across many unrelated languages — likely just a natural sound people make to call attention.

“Hey” is a very common word in modern English, usually learned at around the A2 level.

“Hey” has 2 distinct senses listed in this dictionary. The most common is: an informal way to greet someone or get their attention.

Both are informal greetings, but "hi" is a straightforward friendly hello, while "hey" is even more casual and relaxed. "Hey" can also be used to get someone's attention or to show surprise, which "hi" cannot. In practice, "hey" feels warmer and more familiar than a simple "hi."

"Hey" is informal. It works well with friends, family, and people you know, but it can seem too casual or even abrupt in professional or first-time situations. In a job email or a message to someone senior, a greeting like "Hello" or "Dear" is a safer, more respectful choice.

"Hey" appears in everyday speech in two main ways. As a greeting: "Hey, good to see you!" And as a way to grab attention: "Hey, wait for me!" It can also express surprise or protest, as in "Hey, that's mine!" Tone and context tell you which meaning is intended.