AI Glossary
Encoder
What does “Encoder” mean?
Encoder: The part of a model that reads input and turns it into a numerical representation capturing its meaning. Encoder-only models such as BERT see the whole input at once, which suits tasks like classification, search and understanding rather than open-ended writing.

What is an example of “Encoder”?
Search systems often use encoder models to turn queries and documents into vectors so that relevant matches can be found by meaning, not just exact keywords.