---
sourceDocument: Australia ServiceNow AI Platform Administration
sourceDocumentLink: https://www.servicenow.com/docs/r/platform-administration

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia ServiceNow AI Platform Administration

ft:clusterId :

    - platadm

bundleId :

    - platadm

workflow :

    - Platform


---

# Dictionary overrides

# Dictionary overrides {#ariaid-title1}

* Release version: Australia
* 
* Updated March 12, 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Dictionary overrides provide the ability to define a field on an extended table differently from the field on the parent table.

For example, for a field on the Task \[task\] table, a dictionary override can change the default
value on the Incident \[incident\] table without affecting the default value on Task \[task\] or on
Change \[change\].

Administrators can override these aspects of a field:

* Reference qualifiers
* Dictionary attributes
* Default values
* Calculations
* Field dependencies
* Default column display values
* Mandatory and read-only status
* **[Define a dictionary override](https://www.servicenow.com/docs/TGy33WBhqtckwMcvHAlydw)**   
  Use a dictionary override to allow a field in a child table to have a different value or behavior than the same field in a parent table. For example, a dictionary override changes the default value of the priority field from 4 in the parent table to 5 in the Incident table.