Ob
//ɒb// adj, name, noun, symbol
adj, name, noun, symbol ·Moderate ·College level
Definitions
Noun
- 1 a halfpenny historical
- 2 an objection archaic
- 3 Initialism of Olympic best. abbreviation, alt-of, countable, initialism, uncountable
- 4 the branch of medicine dealing with childbirth and care of the mother wordnet
- 5 the obese gene
Show 7 more definitions
- 6 Initialism of outside broadcast. abbreviation, alt-of, countable, initialism, uncountable
- 7 observation
- 8 Initialism of outside broadcasting. abbreviation, alt-of, countable, initialism, uncountable
- 9 Initialism of old boy (a male graduate; also a CB radio operator's term of address for a male). abbreviation, alt-of, countable, initialism, uncountable
- 10 Abbreviation of obstetrician. abbreviation, alt-of, countable, uncountable
"One woman in ten is at risk — yet one-third of all women over 50 have never had a mammo! By making Pap tests routine, OBs and GYNs have saved many lives."
- 11 Abbreviation of obstetrics. abbreviation, alt-of, countable, uncountable
- 12 Abbreviation of Old Babylonian. abbreviation, alt-of, countable, uncountable
Adjective
- 1 Abbreviation of obstetric. abbreviation, alt-of, not-comparable
- 2 Initialism of out of bounds. abbreviation, alt-of, initialism, not-comparable
- 3 Abbreviation of obligatory (as in "ob. link" on Usenet) (see ObLink at c2.com; see also ob-) abbreviation, alt-of, not-comparable
- 4 Abbreviation of Old Babylonian. abbreviation, alt-of, not-comparable
Symbol
- 1 The set of objects of a category.
Proper Noun
- 1 A river in Russia; the westernmost of the three great Siberian rivers.
Example
More examples"The river Ob, located in western Siberia, is Russia's longest river."
Etymology
Etymology 1
From Latin ob, abbreviation of obolus.
Etymology 2
Abbreviations.
Etymology 3
From Russian Обь (Obʹ).
Related phrases
More for "ob"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.