<p><strong>Noun</strong></p><ul><li>Psychiatry: a developmental disability of highly variable presentation, commonly characterized by social and communication differences, repetitive behaviors, intense specialized interests, and differences in sensory processing; autism spectrum disorder.</li><li>Sometimes classic autism.</li><li>(no longer in clinical use) a developmental disability that commonly manifests in early childhood, characterized by repetitive or restricted behaviors, differences in understanding social interactions, and delayed development of linguistic and cognitive abilities; formerly contrasted with Asperger syndrome.</li></ul>