Meaning of the word "key word" in English

What does "key word" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

key word

US /ˈkiː ˌwɜːrd/
UK /ˈkiː ˌwɜːd/

Noun

1.

a word or concept of great significance

Example:
The key word in his speech was 'innovation'.
Understanding the key words of the question is crucial for a good answer.
2.

a word used as a reference point for finding other words or information, especially in a dictionary, index, or search engine

Example:
Type a key word into the search bar to find relevant articles.
The index lists all topics by key word.