Word.ws English Dictionary

sider

sider noun: one who takes a side. Also the obsolete form of cider.

Noun (1)

sider (plural siders)

  1. One who takes a side.
    • enemies of God and our Religion, and siders with Antichrist1644, Robert Ram, The Souldiers Catechisme

Noun (2)

sider (plural siders)

  1. (in-compounds, rare) A shape with a specified number of sides.
    • So if Colorado is not a rectangle, what is it? Well, not a pentagon, (Greek for 5-sider), hexagon (6-sider), or a heptagon (7-sider), but a—hold on to something—hexahectaenneacontakaiheptagon (697-sider).2023 January 23 [2018 October 31], Frank Jacobs, “Colorado Is Not a Rectangle—It Has 697 Sides”, in Big Think, archived from the original on 20 Apr 2023

Also used as

sider is also the obsolete form of cider.

Forms of sider

pluralsiders

Origin of sider

From side + -er (agent noun suffix).

From side + -er (measurement suffix).

Questions about sider

What does sider mean?
Sider means one who takes a side.
What part of speech is sider?
Sider is a noun.
What is the plural of sider?
The plural of sider is siders.

Words near sider in the dictionary

  1. sideproducts
  2. sidequel
  3. sidequels
  4. sidequest
  5. sidequests
  6. sider
  7. sideral
  8. sideral time
  9. sideramine
  10. sideramines
  11. sideraphthite

Source and license

Adapted from Wiktionary: sider (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “sider.” Word.ws, https://word.ws/sider. Based on Wiktionary, CC BY-SA 4.0.