In dictionary entries, there are <u>abbreviations</u>, in the case of n. (noun), that function as indicators of the different <u>parts of speech</u> of the <u>English language</u> (verb tense, grammar) the words defined belong.
Other <u>abbreviations</u> are used to indicate different subjects such as the origin of words, <em>L.</em> (latin); or the use of a word in specific circumstances, <em>colloq.</em> (colloquial).