Definition, synonyms and related words
plural of dictionary
"The students brought their dictionaries to the library to look up unfamiliar words."
Third-person singular simple present indicative form of dictionary
"The third person singular simple present indicative form of dictionary is dictionaries."
In plain English: To dictionary something means to look up its meaning in an online tool that acts like a giant digital book of words and definitions.
"The search engine tried to dictionaries every typo I made before finding any matches."