Definition of "bass"

bass¹

/beɪs/

adjective
comparative basser, superlative bassest
1. Of sound, a voice or an instrument, low in pitch or frequency.
noun
plural basses
1. A low spectrum of sound tones.
2. A section of musical group that produces low-pitched sound, lower than the baritone and tenor.
3. One who sings in the bass range.
4. (music) An instrument that plays in the bass range, in particular a double bass, bass guitar, electric bass or bass synthesiser.
5. The clef sign that indicates that the pitch of the notes is below middle C; a bass clef.
verb
third-person singular simple present basses, present participle bassing, simple past and past participle bassed
1. To sound in a deep tone.
  Quotations
  […] and the Thunder(That deepe and dreadfull Organ-Pipe) pronounc'dThe name of Proſper : it did baſe my Treſpaſſe
  1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene iii], lines 99-99

/bæs/

/bæs/