The bill would ban TikTok in the United States if its owner ByteDance fails to divest the app over the next nine months
The service, which was originally launched in 1995, is celebrating Dictionary Day this year by giving the app a massive overhaul, technology website CNET reported.
"We are adding some of our most popular content to the premium Dictionary.com app which already includes two million entries in its standard dictionary," Michele Turner, CEO of Dictionary.com, was quoted as saying.
Previously, the Dictionary.com app offered a range of specialist dictionaries - slang, medical, science and rhyming dictionaries.
The services also include example sentences, a translator with over 20 languages, grammar and tips, idioms and phrases and an encyclopaedia.
The app can be downloaded free from Apple stores.