noun
Meaning 1
A portable speaker placed near one's bed or under a pillow, intended to play sleep-inducing white noise or other repetitive sounds to help the user sleep; occasionally other functions such as aromatherapy are included.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: sound machine, white noise machine
Antonyms: none provided