Non free and not for PB (possible to convert??), just looking up some samples:
https://download.cnet.com/Hebrew-Eng...5_4-44568.html
https://www.amazon.com/ENGLISH-Bi-Li.../dp/B00DJWDLLG
http://www.miklalsoftware.com/strong...for-e-readers/
Another idea I had while looking up, is to check if one of the few resources online (like those linked here
https://www.lexilogos.com/english/hebrew_dictionary.htm) allows mass download, and then look into conversion.
Then I'm sure that you could get the pdf of any of the uncountable biblical dictionaries published in the 18 and 19th century, but that doesn't qualify as a solution in my view.
ETA: oh, if it is about pdfs there are even not bad ones, e.g.
https://archive.org/stream/AComprehe...stKlein1987OCR
https://archive.org/stream/anglohebrewmoder00raffuoft
all linked at the lexilogos page. I principle they are OCRd, but I wouldn't trust the result at all.