We found 22 dictionaries that define the word semiannual:

General (16 matching dictionaries)

1. semiannual: Merriam-Webster
2. semiannual: Oxford Learner's Dictionaries
3. semiannual: American Heritage Dictionary of the English Language
4. semiannual: Collins English Dictionary
5. semiannual: Vocabulary.com
6. Semiannual, semiannual: Wordnik
7. semiannual: Wiktionary
8. semiannual: Webster's New World College Dictionary, 4th Ed.
9. semiannual: The Wordsmyth English Dictionary-Thesaurus
10. semiannual: Infoplease Dictionary
11. semiannual: Dictionary.com
12. semiannual: Rhymezone
13. semiannual: FreeDictionary.org
14. semiannual: Mnemonic Dictionary
15. semiannual: TheFreeDictionary.com
16. semiannual: Wikimedia Commons US English Pronunciations

Art (1 matching dictionary)

17. ODLIS: Online Dictionary of Library and Information Science (No longer online)

Business (3 matching dictionaries)

18. MoneyGlossary.com (No longer online)
19. Semiannual: Investopedia
20. semiannual: Financial dictionary

Computing (1 matching dictionary)

21. semiannual: Encyclopedia

Medicine (1 matching dictionary)

22. semiannual: Medical dictionary

(Note: See semiannually as well.)

Definitions from Wiktionary (semiannual) ▸ adjective:  Biannual: occurring twice a year ▸ noun:  Something occurring twice each year. Similar: biannual, biyearly, twice-yearly, bi-annual, half-yearly, bimestrial, semestral, bimonthly, semimonthly, biennial, more... Types: biannual, biannually, semiannually, more... Phrases: semiannual report, more... ▸ Words similar to semiannual ▸ Usage examples for semiannual ▸ Idioms related to semiannual ▸ Wikipedia articles (New!) ▸ Popular adjectives describing semiannual ▸ Popular nouns described by semiannual ▸ Words that often appear near semiannual ▸ Rhymes of semiannual ▸ Invented words related to semiannual