We found 13 dictionaries that define the word by gum:

General (9 matching dictionaries)

1. by gum: Merriam-Webster
2. By gum: Cambridge Advanced Learner's Dictionary
3. by gum: Wiktionary
4. by gum: Dictionary.com
5. by gum: TheFreeDictionary.com
6. By gum: Phrase Finder
7. by gum: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

8. by gum: Encyclopedia

Medicine (1 matching dictionary)

9. by gum: Medical dictionary

Miscellaneous (1 matching dictionary)

10. by gum: Idioms

Slang (1 matching dictionary)

11. By gum: English slang and colloquialisms used in the United Kingdom

Definitions from Wiktionary (by gum) ▸ adverb:  (UK, New Zealand, minced oath) by God Similar: swearingly, bloody, heckin', then, bally, smegging, for pity's sake, gobbetly, only, for shame's sake, more... ▸ Words similar to by gum ▸ Usage examples for by gum ▸ Idioms related to by gum ▸ Wikipedia articles (New!) ▸ Words that often appear near by gum ▸ Rhymes of by gum ▸ Invented words related to by gum