Definitions

1. adverb

alas, unfortunately, or unhappily

“She cried helas as she heard the news about her pet.”

2. interjection

an expression of grief or regret

“He let out a loud helas as he lost his favorite book.”

3. noun

a word used to express sorrow, grief, or regret

“The poet used the word helas to convey the sorrow of the scene.”