public void setDefinition(java.util.Collection<NamedEntityDefinition> definition) {
        if (definition == null) {
            this.definition = null;
            return;
        }

        this.definition = new java.util.ArrayList<NamedEntityDefinition>(definition);
    }
<p>
The definition of a named entity.
</p>

@param definition
       The definition of a named entity.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/TopicNamedEntity.java