IPA: /ɪˈleɪtɪdnəs/
KK: /ɪˈleɪtɪdnəs/
A feeling of great happiness and excitement.
She felt a sense of elatedness after receiving the good news.
Elatedness is formed from "elate" (from Latin "elatus", meaning raised or uplifted) and the suffix "-ness" (meaning the state or quality of). The word describes the state of being uplifted or in high spirits.
Think of being 'uplifted' ('elate') and in a joyful 'state' ('-ness') — that's what elatedness means.