The Hebrew-English lexicon of Brown, Driver, and Briggs (a.k.a. “BDB”), first published in 1906, served for a century as the staple, beefy dictionary for Anglophone readers of the Hebrew Bible. Based on the work of Gesenius, it remains a classic. It is available in electronic form with the major Bible software packages, but you can also download this searchable PDF of the 1939 Oxford University Press printing of the 1906 edition (it also includes the Addenda et Corrigenda at the back).
There is just one other copy on Archive.org, but it is of a much older printing which makes the copy linked here the only realistic option.
For an overview of current lexica of biblical Hebrew, see John Hobbins’s helpful essay.