Dictionaries:
* Online Dictionaries: Merriam-Webster, Oxford English Dictionary, Dictionary.com, Cambridge Dictionary, etc.
* Physical Dictionaries: Any good dictionary, such as the American Heritage Dictionary or the Oxford English Dictionary.
Thesaurus:
* Online Thesauruses: Thesaurus.com, Merriam-Webster Thesaurus, etc.
* Physical Thesauruses: These will list synonyms and antonyms for "giddy."
Other Resources:
* Wikipedia: The Wikipedia entry for "Giddy" may contain a definition and other relevant information.
* Linguistic Resources: Websites or books that focus on the history or etymology of words might offer insights into the word's origin and development.
Example Definitions:
* Merriam-Webster: "feeling or showing lighthearted, carefree gaiety"
* Oxford English Dictionary: "feeling or appearing lightheaded and dizzy, especially from excitement or nervousness"
* Cambridge Dictionary: "feeling silly and excited, often because you are happy or in love"
Remember, different dictionaries might provide slightly different shades of meaning for the word "giddy," so it's always good to consult multiple sources for a comprehensive understanding.