expansion

noun12

1. •
   An act, process, or instance of expanding.

   • The expansion of metals and plastics in response to heat is well understood.
2. •
   The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston.
3. •
   An increase in the market value of an economy over time.
4. •
   Stretching of geometric objects with flat sides.
5. •
   A product to be used with a previous product.

   • This expansion requires the original game board.
6. •
   Ellipsis of expansion pack.
7. •
   A new addition.

   • My new office is in the expansion behind the main building.
8. •
   The replacement of a short name (e.g., acronym, initialism, alphanumeric symbol, abbreviation) with the longer name that is synonymous with it, as when spelling out acronyms to ensure clarity for a general audience.

   • Expansion of acronyms is often helpful for nonexpert readers (anacronyms excluded).
9. •
   The string of text thus substituted.

   • The acronym "FNDs" can mean either "functional neurologic disorders" or "focal neurologic deficits", so you'd better use the expansion instead of the acronym, for clarity in this context; readers of this paragraph may not have read, or remember, which definition you used 40 pages earlier.
10. •
    The rewriting of an expression as a longer but equivalent sum of terms.
11. •
    That which is expanded; expanse; extended surface.
12. •
    The fractional change in unit length per unit length per unit temperature change.

    • Look up the expansion of 1018 steel at stick welding temps and figure out how far this thing's gonna bend once we weld it up.