Definition of "sp"

sp

noun
1. Abbreviation of spelling. (often used when correcting or questioning one's own spelling)
  Quotations
  Does this mean that I would have to use Z-buffering, or tessellate (sp?) the resultant (possibly nonconvex) polygon into triangles and draw them in Z-order?
  1993, Keith Lau, “More help needed! Spacecuts, etc ...”, in comp.graphics (Usenet)
  It's all that Britney Spears' fault and that other trashy looking singer, Christina Aguilera sp??? geezzzzzz.. they look like hookers !!!!!!
  2003, Maggie, “I am back again...”, in alt.penpals.rejects (Usenet)
2. Abbreviation of spur. (in highway designations and signage)
3. Abbreviation of special.
4. (typography) Abbreviation of space.
verb
1. (proofreading) Abbreviation of spell out.