Neologisms: from author use to dictionary entry

This article is devoted to neologisms and their use in speech. The authors analyze various ways of the appearance speech, formation. subject research that appear either together with new concepts, phenomena, historical figures, or when an existing lexical unit expands old meaning acquires a meaning. purpose consider reasons affecting stability neologism identify trends lead first stable then, it becomes language, be included appropriate dictionaries. main methods are descriptive analytical methods. scientific novelty this work lies fact for time number specifics functioning language considered it. As result carried out, why most disappear from speech investigated, only some them fall into dictionaries general literary very small become terms. It established occurrence depends on social economic factors. At same time, formation as well its development terminological unit, possible if requirements met.