ht.ac.uk
The Historical Thesaurus of English is a University of Glasgow resource that documents the evolution of English word meanings from early medieval times to the present. It organizes nearly all recorded English words into hierarchical meaning structures, based primarily on the Oxford English Dictionary and A Thesaurus of Old English. The first print edition was published in 2009, and the online second edition has been released on the project site from 2020 onwards. It is intended for use by linguists, historians, and students of English.