We found 26 dictionaries that define the word mentally:

General (21 matching dictionaries)

1. mentally: Merriam-Webster
2. mentally: Oxford Learner's Dictionaries
3. mentally: Collins English Dictionary
4. mentally: Vocabulary.com
5. Mentally, mentally: Wordnik
6. mentally: Cambridge Advanced Learner's Dictionary
7. mentally: Wiktionary
8. mentally: The Wordsmyth English Dictionary-Thesaurus
9. mentally: Infoplease Dictionary
10. Mentally, mentally: Dictionary.com
11. mentally: Cambridge Essential American English Dictionary
12. Mentally: Online Plain Text English Dictionary
13. mentally: Webster's Revised Unabridged, 1913 Edition
14. mentally: Rhymezone
15. mentally: AllWords.com Multi-Lingual Dictionary
16. mentally: Webster's 1828 Dictionary
17. mentally: FreeDictionary.org
18. mentally: Mnemonic Dictionary
19. mentally: TheFreeDictionary.com

Business (1 matching dictionary)

20. mentally: Legal dictionary

Computing (1 matching dictionary)

21. mentally: Encyclopedia

Medicine (2 matching dictionaries)

22. mentally: Merriam-Webster Medical Dictionary
23. mentally: Medical dictionary

Miscellaneous (1 matching dictionary)

24. mentally: Idioms

(Note: See mental as well.)

Definitions from Wiktionary (mentally) ▸ adverb:  In a mental manner; an idea thought out in one's mind, as opposed to an idea spoken orally. Similar: physically, psychologically, emotionally, psychically, spiritually, intellectually, metally, cognitively, cerebrally, psychiatrically, more... Opposite: physically, tangibly, materially, corporeally, somatically Types: anxious, depressed, manic, bipolar, schizophrenic, psychotic, paranoid, antisocial, more... Phrases: mentally ill, mentally retarded, mentally handicapped, mentally disordered, mentally disabled, more... Colors:     blue,     green,     gray,     purple,     white, more... ▸ Words similar to mentally ▸ Usage examples for mentally ▸ Idioms related to mentally ▸ Wikipedia articles (New!) ▸ Words that often appear near mentally ▸ Rhymes of mentally ▸ Invented words related to mentally