def policy_definition_absent(name, connection_auth=None):
    '''
    .. versionadded:: 2019.2.0

    Ensure a policy definition does not exist in the current subscription.

    :param name:
        Name of the policy definition.

    :param connection_auth:
        A dict with subscription and authentication parameters to be used in connecting to the
        Azure Resource Manager API.
    '''
    ret = {
        'name': name,
        'result': False,
        'comment': '',
        'changes': {}
    }

    if not isinstance(connection_auth, dict):
        ret['comment'] = 'Connection information must be specified via connection_auth dictionary!'
        return ret

    policy = __salt__['azurearm_resource.policy_definition_get'](name, azurearm_log_level='info', **connection_auth)

    if 'error' in policy:
        ret['result'] = True
        ret['comment'] = 'Policy definition {0} is already absent.'.format(name)
        return ret

    elif __opts__['test']:
        ret['comment'] = 'Policy definition {0} would be deleted.'.format(name)
        ret['result'] = None
        ret['changes'] = {
            'old': policy,
            'new': {},
        }
        return ret

    deleted = __salt__['azurearm_resource.policy_definition_delete'](name, **connection_auth)

    if deleted:
        ret['result'] = True
        ret['comment'] = 'Policy definition {0} has been deleted.'.format(name)
        ret['changes'] = {
            'old': policy,
            'new': {}
        }
        return ret

    ret['comment'] = 'Failed to delete policy definition {0}!'.format(name)
    return ret