I assume you're using search from the top-right corner of the Web Client ? If the form definition space appears in the search result, then you can also select the "View Details" icon. The location of the form will be displayed just below the Details of '<form name>', eg.
Location: /Company Home/Data Dictionary/Web Forms
Please be aware that the /Company Home/Data Dictionary now contains:
/Web Forms - for storing Web Form definitions (as used by Alfresco WCM)
/Forms - for storing DM Form definitions (as used by Alfresco ECM)
If you created the web form using the create/edit web project wizard then it should appear under /Web Forms (not /Forms).
We fixed a couple of minor issues in Alfresco 2.9B Community Labs, so it might be worth upgrading to the latest release.
Thanks,
Jan