Where did you get this dictionary?
Is it the Advanced version such as Amazon lists for download?
If so have you tried the customer service support of the vender site?
On the above page, they say there is no refund and no sales out of the USA
to suggest looking for the download in a system download file folder, or any
where your OS version may store new download files. Once opened, it may
have gone into the Applications Folder. Or in a user desktop Finder location.
The Apple Support Communities discussions are users of Apple products
who visit and attempt to help resolve non-technical issues with products
and applications made by Apple. Volunteers. As in 'unpaid.'
Perhaps you can give more information on your Mac or Apple product
and if there is a possible problem with it, then a new topic can begin.
The Tiger 10.4.11 OS X in my computers had a fair built-in dictionary.
There were a few OK free widgets, to run in Dashboard or standalone.
Good luck & happy computing!
Assuming your machine actually says MacBook, you should be able to upgrade directly to 10.6. Here's how:
If it says iBook or Powerbook it is not compatible with 10.6.