er /ɜɹ/exclamation 1noun 2verb 1forms 3 exclamation1 •(informal) a sound made by someone who stops for a moment while speaking, not sure how to go on“Er...Feathered Omen, hoot not,” he continued uneasily, “Son of Tanit, hoot not!” — 1970 noun2 •An occurrence of the interjection "er". •The name of the Cyrillic script letter Р / р. verb1 •(informal) To utter the word er when hesitating in speech.He ummed and erred his way through the presentation. formserred · erring · ers
ER noun7 •Initialism of emergency room. •Initialism of endoplasmic reticulum. •Initialism of earned run. •Initialism of entity-relationship. •Initialism of estrogen receptor. •Initialism of enhanced radiation. •Initialism of Einstein-Rosen bridge. formsERs