We found 12 dictionaries that define the word observationally:

General (8 matching dictionaries)

1. observationally: Merriam-Webster
2. observationally: Oxford Learner's Dictionaries
3. observationally: Collins English Dictionary
4. observationally: Vocabulary.com
5. observationally: Wordnik
6. observationally: Wiktionary
7. observationally: Dictionary.com
8. observationally: TheFreeDictionary.com

Business (1 matching dictionary)

9. observationally: Legal dictionary

Computing (1 matching dictionary)

10. observationally: Encyclopedia

Medicine (2 matching dictionaries)

11. observationally: Merriam-Webster Medical Dictionary
12. observationally: Medical dictionary

(Note: See observation as well.)

Definitions from Wiktionary (observationally) ▸ adverb:  In an observational way. Similar: observedly, observantly, objectually, observably, optometrically, unobservably, autoptically, inobservantly, monitorially, unobservedly, more... Types: visual, auditory, olfactory, tactile, gustatory, more... ▸ Words similar to observationally ▸ Usage examples for observationally ▸ Idioms related to observationally ▸ Wikipedia articles (New!) ▸ Words that often appear near observationally ▸ Rhymes of observationally ▸ Invented words related to observationally