Glossary

The AI terms
that actually matter.

A working glossary of AI concepts — written for business leaders and operators who need to make real decisions, not for researchers.

AI Agents

AI systems that can reason about goals, use tools, take multi-step actions, and adapt based on results — without human intervention at each step.

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Embeddings

Dense numerical representations of text, images, or other data that capture semantic meaning in a way that machines can compare and search.

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Fine-Tuning

The process of further training a pretrained language model on a specific dataset to specialize its behavior, style, or domain.

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Hallucination

When a language model produces confident-sounding output that is factually incorrect or unsupported by its inputs.

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Multimodal AI

AI systems that can process and generate across multiple input types — text, images, audio, video — within a single model.

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Transformer

The neural network architecture — based on attention — that powers every modern LLM, image model, and most state-of-the-art AI.

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Vector Database

A specialized database that stores and searches high-dimensional numerical representations of text, images, or other data — enabling semantic similarity search.

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