er

Short definition from Wiktionary

Interjection

1. 1
   Said when hesitating in speech.

Verb

1. 1
   To utter the word er when hesitating in speech.

Noun

1. 1
   An occurrence of the interjection "er".
2. 2
   The name of the Cyrillic script letter Р / р.
3. 3
   Initialism of earned run.
4. 4
   Initialism of endoplasmic reticulum.
5. 5
   Initialism of entity-relationship.
6. 6
   Initialism of emergency room.
7. 7
   Initialism of estrogen receptor.
8. 8
   Initialism of Einstein-Rosen bridge.
9. 9
   Initialism of enhanced radiation.

Proper noun

1. 1
   Initialism of Elizabeth Regina (“Queen Elizabeth”).
2. 2
   Initialism of Edward Rex (on coins, letterboxes, etc.) The royal cypher for Edward VII, king of Great Britain
3. 3
   Initialism of Eleanor Roosevelt.
4. 4
   Abbreviation of Erie (“Erie, Pennsylvania, USA”).
5. 5
   A surname.

Symbol

1. 1
   Chemical symbol for erbium.