Definitions

1. proper noun

a feminine given name, of Irish origin, derived from the name Eilidh, meaning ‘beauty’ or ‘radiance’

“My grandmother’s name is Eileen, and it’s of Irish descent.”

2. noun

a female given name, equivalent to the Irish name Eilidh or Aileen

“Eileen is a lovely name for a little girl, don’t you think?”

3. interjection

expression of surprise or excitement

“Eileen! I didn’t expect you to be here tonight!”