---
layout: page
title: UNDEFINE 
tagline: ksqlDB UNDEFINE statement
description: Syntax for the UNDEFINE statement in ksqlDB
keywords: variable, substitution, define, undefine
---

# UNDEFINE

## Synopsis

```sql
DEFINE <name>'
```

## Description

Undefines a currently defined variable.

## Example

```
UNDEFINE replica_count;
```
