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January 29, 2026

AI Glossary (A–Z)

Airia Team
AI Glossary (A–Z)

A

Agent-to-Agent Protocol (A2A)

A standard that allows AI agents to communicate and coordinate with each other to complete tasks across systems without human intervention.

AI Agent

A system that uses generative AI to autonomously plan, decide, and take action towards a goal. 

AI Governance

The framework of policies, controls, and processes that guide how AI systems are designed, deployed, and managed. 

AI Lifecycle

The end-to-end process of designing, deploying, operating, monitoring AI systems. 

AI Sprawl

The uncontrolled spread of AI tools and agents across an organization without clear visibility, governance, or ownership.

C

Context Window

The maximum number of text a model can consider at once when generating a response. 

E

Enterprise Search

A system that enables users and AI applications to securely search across internal organizational data sources, such as documents, databases, and knowledge bases. 

F

Fine-Tuning

Additional training of a pre-trained model using specialized data to improve performance for a specific task or domain. 

Foundation Model

A large, general-purpose model trained on broad datasets that can be adapted to many use cases. 

G

Generative AI

AI systems that create new content such as text, images, code, audio, or video. 

Guardrails

Technical or policy-based constraints that limit AI behavior to reduce risk and misuse. 

H

Hallucination

When a generative AI system produces incorrect or fabricated information presented as fact. 

Human-in-the-Loop (HITL)

A governance approach where humans review, approve, or intervene in AI-generated outputs. 

I

Inference

The process where a trained AI model generates outputs in response to new inputs. 

L

Large Language Model (LLM)

A generative AI model trained on massive datasets to understand and generate Language. 

M

Model Context Protocol (MCP)

A method for defining what information, instructions, and constraints an AI model receives to ensure consistent and reliable outputs.

Model Drift

Performance degradation that occurs when a model’s outputs become less accurate over time. 

Model Registry

A centralized inventory of approved AI models, versions, and deployment metadata. 

Multimodal Model

A generative AI model capable of processing and generating multiple data types such as text, images, audio, or video. 

N

Natural Language

Human language, spoken or written, that AI systems can understand and generate to enable intuitive interaction.

O

Observability

The practice of tracking AI behavior, performance, and outputs over time. 

P

Prompt

The input or instruction provided to a generative AI system that guides its output. 

Prompt Engineering

The practice of designing prompts to improve accuracy, reliability, and safety of AI outputs. 

Prompt Injection

A security vulnerability where hidden or malicious instructions alter a model’s intended behavior. 

R

Red Teaming

A structured testing approach where teams intentionally probe AI systems for weaknesses, failure modes, misuse scenarios, or security risks. 

Responsible AI

An approach to building and using AI that emphasizes safety, transparency, accountability, and ethical use. 

Retrieval-Augmented Generation (RAG)

A technique that allows generative AI systems to retrieve relevant external data before generating a response. 

Routing Engine

A system that dynamically directs requests, tasks, or workloads to the appropriate AI model, agent, or resource based on rules, context, or policies. 

S

Security Posture Management

The continuous assessment and monitoring of an organization’s AI systems to identify security risks, misconfigurations, and policy violations. 

Shadow AI

Unapproved or unmanaged use of AI tools or models within an organization. 

Small Language Model (SLM)

A lightweight language model optimized for efficiency and specific tasks, requiring fewer resources than large models. 

System Prompt

A high-level instruction that defines how a model or agent should behave across interactions. 

T

Token

A basic unit of text (such as a word or word fragment) processed by a language model. 

Tool Calling

A capability that enables AI models or agents to interact with external tools, APIs, or systems. 

V

Vector Database

A database optimized for storing and searching embeddings, often used in a retrieval-augmented generation system.