New words are added to major dictionaries continuously, with most established dictionaries like Oxford English Dictionary and Merriam-Webster updating their entries multiple times per year. The Oxford English Dictionary performs quarterly updates, adding new entries and revisions based on evidence of actual usage in published texts, online sources, and spoken language. Merriam-Webster similarly adds hundreds of new words annually, selected based on whether they meet criteria for widespread use, documented citations, and established meaning.
The rate and selection process vary by dictionary. Some focus on words that have been in use for a minimum period (typically 5-10 years of documented evidence), while others respond more quickly to newly emerging terms, especially in digital and scientific contexts. Digital dictionaries can update more frequently than print editions, allowing them to reflect language evolution in real time.
Words enter dictionaries through organic language evolution rather than formal approval processes. Factors driving new entries include technological innovation ("cryptocurrency," "emoji"), cultural shifts, scientific discoveries, and changes in how people communicate. Slang and colloquial terms may eventually be included if they achieve widespread, sustained usage across diverse contexts.
The exact number of new words varies yearly—some estimates suggest hundreds to several thousand words are added across all major dictionaries combined, depending on how you count variant forms and regional entries. However, only a fraction of newly coined words achieve dictionary status, as most either fade from use or remain specialized to particular communities.