英文释义：

1. Greeting: a polite word or action that you use when you meet or welcome someone.

2. Pronunciation: [ɡriːtɪŋ]

3. Usage:

- As a noun, it refers to the act of saying hello or showing politeness when meeting someone.

- As a verb, it means to say hello or welcome someone in a friendly way.

4. Examples:

1) When I walked into the room, everyone turned to me and said their greetings.

当我走进房间，每个人都转向我并向我打招呼。

2) She greeted her guests with a warm smile and offered them some snacks.

她用温暖的微笑迎接客人，并给他们提供了一些小吃。

5. Synonyms:

- Salutation: a word or phrase used as a greeting.

- Welcome: an expression of greeting or goodwill.

- Hello: an informal greeting used when meeting someone.

- Good day: a formal greeting used during the day.

- Howdy: an informal greeting used in some parts of the United States.

6. Editor's summary:

In summary, "greeting" is a common word used to express politeness and welcome when meeting someone. It can be used as both a noun and verb, and has synonyms such as "salutation," "welcome," "hello," "good day," and "howdy." Remember to greet people with kindness and respect to make them feel welcomed.