We found 50 dictionaries that define the word altar:

General (28 matching dictionaries)

1. altar: Merriam-Webster
2. altar: Oxford Learner's Dictionaries
3. altar: American Heritage Dictionary of the English Language
4. altar: Collins English Dictionary
5. altar: Vocabulary.com
6. Altar, altar: Wordnik
7. altar: Cambridge Advanced Learner's Dictionary
8. altar: Wiktionary
9. altar: Webster's New World College Dictionary, 4th Ed.
10. altar: The Wordsmyth English Dictionary-Thesaurus
11. altar: Infoplease Dictionary
12. Altar, altar: Dictionary.com
13. altar: Online Etymology Dictionary
14. altar: Cambridge Essential American English Dictionary
15. Altar (Bible), Altar (Brazilian band), Altar (Catholicism), Altar (Dutch band), Altar (Judaism), Altar (Romanian band), Altar (Wicca), Altar (album), Altar (disambiguation), Altar (film), Altar, The Altar (Herbert poem), The Altar (rock), The Altar: Wikipedia, the Free Encyclopedia
16. Altar: Online Plain Text English Dictionary
17. altar: Webster's Revised Unabridged, 1913 Edition
18. altar: Rhymezone
19. Altar (m), altar, altar: AllWords.com Multi-Lingual Dictionary
20. altar: Webster's 1828 Dictionary
21. altar: FreeDictionary.org
22. altar: Mnemonic Dictionary
23. altar: TheFreeDictionary.com
24. altar: Wikimedia Commons US English Pronunciations
25. altar: Longman Dictionary of Contemporary English
26. altar: Merriam-Webster

Art (4 matching dictionaries)

27. altar: ArtLex Lexicon of Visual Art Terminology
28. Glossary: Gothic Art and Architecture (No longer online)
29. altar: Glossary of Medieval Art and Architecture
30. Glossary of Stamp Collecting Terms (No longer online)

Computing (1 matching dictionary)

31. Altar: Encyclopedia

Medicine (1 matching dictionary)

32. online medical dictionary (No longer online)

Miscellaneous (4 matching dictionaries)

33. Brilliant Dream Dictionary (No longer online)
34. Sound-Alike Words (No longer online)
35. altar: Idioms
36. A Dictionary Of WitchCraft (No longer online)

Religion (7 matching dictionaries)

37. Altar: Easton Bible
38. Religious Tolerance (No longer online)
39. Altar (in Liturgy): Catholic Encyclopedia
40. Glossary of spiritual and religious terms (No longer online)
41. Postmodern Bible Dictionary (No longer online)
42. Altar: Smith's Bible Dictionary
43. Irivng Hexham's Concise Dictionary of Religion (No longer online)

Science (1 matching dictionary)

44. Archaeology Wordsmith (No longer online)

Slang (2 matching dictionaries)

45. altar: Green’s Dictionary of Slang
46. altar: Urban Dictionary

Tech (2 matching dictionaries)

47. altar: Glossary of Medieval Architecture
48. Urban Conservation Glossary (No longer online)

(Note: See altars as well.)

Definitions from Wiktionary ( ) ▸ noun:  A table or similar flat-topped structure used for religious rites. ▸ noun:  (informal) A raised area around an altar in a church; the sanctuary. ▸ noun:  (figurative) Any (real or notional) place where something is worshipped or sacrificed to. Similar: communion table, tabernacle, shrine, chapel, baldachino, sanctuary, priest, reconsecrate, crucifix, consecration, more... Opposite: floor, ground, base, secular, profane Types: Catholic altar, Buddhist altar, Hindu altar, Jewish altar, Wiccaltar, pagaltar, Christialtar, more... Phrases: high altar, altar boy, altar boys, family altar, altar rail, more... Adjectives: high, main, great, small, sacrificial, golden, holy, sacred, portable, central, domestic Colors:     white,     gold,     red,     purple,     green, more... ▸ Word origin ▸ Words similar to altar ▸ Usage examples for altar ▸ Idioms related to altar ▸ Wikipedia articles (New!) ▸ Popular adjectives describing altar ▸ Words that often appear near altar ▸ Rhymes of altar ▸ Invented words related to altar