This word has multiple meanings. I see that the musical instrument part and fish part are well written already, so I'll skip these two and define it according to Meghan Trainor's songs:
Bass, in contrary to treble, refers to women that are not model-thin, and has confident in their body shape; they don't try to lose weight unhealthily, or feel sorry for themselves for not being 'fit' to society's trending standards.
(Lyrics quote) You know I won't be no stick-figure silicone barbie doll, so if that's what you're into then go 'head and move along...because you know I'm all about that bass, no treble.
(Lyrics quote)I smell her on your collar...I gave you bass, you gave me sweet talk...Tell me do you think I'm dumb?
by Evergreen712 January 20, 2015
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Low frequency oscillations produced by rapid movement of large volumes of air at multiple cycles per second thus producing a very low rumbling sound that is harnessed and used in music form
Hey mr. dj why dont you drop that bass
by Justice October 16, 2002
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what kim deal plays with the pixies.

what d'arcy played with smashing pumpkins.

what lorna doom played in the germs.

what kim gordon plays in sonic youth.

what melissa auf der maur plays.

what kristen pfaff played in hole.

what carol kaye plays.

what gail greenword played in belly.

what jeniffer finch played in L7.

what jill emery plays in mazzy star.

what kim chi played with the distillers.

what tina weymouth played with talking heads.

what kelley deal played with the last hard men.

what all the cool girls play.
"the best bands in the world have female bassists." - ted, brave new girl.
by the she February 24, 2005
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Bass is one of the most beautiful musical instruments in existence - upright, electric or acoustic, whatever you like better - they're all magical.

Without bass in the room, music can be heard, but not felt.
That girl's a bassist man, she's amazing.

... I CALL DIBS!!!!
by jazzdrummer25 June 24, 2009
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Commonly used word in the Beaches area of Toronto and beyond.

A.) Bass refers to the one and only C-Bass. Bass has become a common 'slang' in the teenage language. It is used as a nickname, in replace of other words in common sayings, an adjective etc.

B.) A common place for sick jamz
Guy A: Did you here Jenny hooked up with Tim?

Guy B: For real? What the Bass!

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Girl A: Yo reach Bass' tonight?
Guy B: Gonna be sick
by lawlywagon November 5, 2010
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a four string instrument commonly tuned to EADG and is similar to the guitar but has a lower pitch. The bass is usually used for rhythm and to give texture to the music. A lot of idiot guitarists say bass is not needed but that is untrue. I'm a guitarist and sometimes I do wish I picked the bass (no pun intended). Some legendary bassists include John Entwhistle, John Paul Jones, Charles Mingus, Roger Waters, and Krist Noveselic.
Listen to some jazz bass. It will blow your mind.
by CMAL14 April 4, 2010
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A four-string guitar that is weak and inferior to the six-string guitar.
That loser plays bass because he sucks at guitar.
by ThatTotallyHappened January 22, 2022
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