Backside

//ˈbækˌsaɪd// adj, noun

adj, noun ·Moderate ·College level

Definitions

Noun
  1. 1
    The back side of anything, the part opposite its front, particularly

    "I gazed uncomprehendedly at the unfinished backside of the wall of the next room and wondered what had happened to my face."

  2. 2
    the fleshy part of the human body that you sit on wordnet
  3. 3
    The back side of anything, the part opposite its front; The back side of an estate: the backyard and outbuildings behind a main house, especially (UK dialect, euphemistic) an outhouse.

    "The building's backside faced an alley and was covered in grime and graffiti."

  4. 4
    the side of an object that is opposite its front wordnet
  5. 5
    The back side of anything, the part opposite its front; A person's buttocks. euphemistic

    "Having ridden the horse all day for the first time, I had painful blisters on my backside."

Show 3 more definitions
  1. 6
    The back side of anything, the part opposite its front; The back side of a page: a verso. obsolete
  2. 7
    The reverse or opposite of anything. figuratively

    "...to endorse him on the backside of posterity, not a golden, but a brazen Asse..."

  3. 8
    Used other than figuratively or idiomatically: see back, side.
Adjective
  1. 1
    Approaching an obstacle backward. not-comparable

Synonyms

All synonyms
buttocksrearbuttocksreararseass

Example

More examples

"Write the sender's address on the backside!"

Etymology

From back + side.

Related phrases

backside throwget off one's backsidehave a sixpenny bit up one's backsidehave a sixpenny bit up one’s backsidekick up the backsidemy backsidepain in the backsidesit on one's backsidethink the sun shines out of someone's backside

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.