Autism - Wikipedia
Autism is primarily characterized by differences and difficulties in social interaction and communication, alongside restricted or repetitive patterns of interests, activities, or behaviors (stimming), and, in many cases, distinctive reactions to sensory input.

Autism spectrum disorder - Symptoms and causes - Mayo Clinic
Autism spectrum disorder is a condition related to brain development that affects how people see others and socialize with them. This causes problems in communication and getting along with others socially. The condition also includes limited and repeated patterns of behavior.

Autism: Symptoms, Causes, Types, and Testing - WebMD
Autistic disorder. This is what most people think of when they hear the word "autism." It affects social interactions, communication, and play in children younger than 3 years.

What is autism? - NHS
Autism is a difference in how your brain develops that affects how you see and experience the world. It is often called a type of neurodivergence. You might also hear autism called autism spectrum disorder (ASD). This is the medical term for a diagnosis of autism.

What is autism - National Autistic Society
Autism influences how people experience and interact with the world. It is a lifelong neurodivergence and disability. Autistic people are different from each other, but for a diagnosis they must share differences from non-autistic people in how they think, feel and communicate.

Signs and Symptoms of Autism Spectrum Disorder
Learn about the signs and symptoms of ASD.

What Are The Signs Of Autism? - Simply Psychology
Autism is a neurodevelopmental condition characterized by differences in social communication, social interaction, and the presence of restricted, repetitive patterns of behavior, interests, or activities. Estimates from 2020 indicate that approximately 1 in 36 children are diagnosed as autistic.

Autism Spectrum Disorder (ASD) Symptoms & Causes
Autism (autism spectrum disorder, or ASD) is a difference in how your child’s brain works that shapes their behaviors, interests, social interactions and ways of communicating. ASD falls under the umbrella of neurodevelopmental disorders.

About Autism Spectrum Disorder | Autism Spectrum Disorder (ASD) | CDC
Scientists believe there are multiple causes of ASD that act together to change the most common ways people develop. We still have much to learn about these causes and how they impact people with ASD. Early intervention services can greatly improve the development of a child with ASD.

Autism - World Health Organization (WHO)
The abilities and needs of autistic people vary and can evolve over time. While some people with autism can live independently, others have severe disabilities and require life-long care and support.