Use dictionaries :
To define a word: A dictionary is the most reliable tool for finding the precise meaning of a word you don't know.
To check spelling: It helps you confirm the correct spelling of a word, which is essential for clear writing.
To improve vocabulary: By exploring synonyms, antonyms, and related words, a dictionary can help you expand your vocabulary and express yourself more effectively.
Use encyclopedias :
Some useful titles are listed below.
You can also search in the boxes below.
Use the OED to find definitions of words.
Other recommended online references:
Searchable research guides across a variety of subject areas.
Contains in-depth, peer-reviewed articles on a wide range of topics. We have access to the Oxford Research Encyclopedia of Environmental Science.
Provides quantitative data and statistics on over 80,000 topics from more than 22,500 sources.