This article studies the dynamics of the development of legal term abbreviations used in the discourse of modern English and Uzbek languages and their structural classification. In this work, the abbreviation is structurally described according to the universality of the model of formation of terms as well as in accordance with the universality of the formation model. The abbreviated lexical units of this speech are divided and analyzed as follows: initial (abbreviations consisting of letters and sounds); syllabic (apocopes, apheresis, synchronization, contractures); complex syllabic (original mixed syllable, additions); a mixed abbreviation. Here is stated that the most commonly used abbreviations in English legal discourse are initials and acronyms, and the least used abbreviations are (cross-sections) hyphens and mixed types. Also, it is determined that abbreviations are mainly used in written speech and are not typical for oral speech.