ill see a sign for land for sale and it will say something like "for sale: land. 60 acres +/-" ill look up the website and it will just say "60 acres for sale and have the price for the whole 60" if i called the realtor would they be willing to sell less or more? im just confused by the whole thing.
Like the two previous answers indicated, it means "not exactly". Typically when a piece of land is subdivided, it is never "exactly" 60 acres. Natural land marks, barriers (things like cliffs, rivers, roads, etc) and things typically stop a subdivision to be exactly to the square foot of a "60 acre" parcel.
Remember, one acre is 43,560 square feet. 60 acres is going to be 2,613,600 square feet or a square lot that is roughly 1,616.65 feet long x 1,616.65 feet wide. Something this size, you wouldn’t notice the 0.65 of a foot one way or the other, which could make the lot either slightly larger or smaller then 60 acres "exactly".
When you buy the property, a title insurance policy should be obtained and they will give you a plat map showing the boundaries of the lot. The exact measurements on file with the county will show the exact size. Additionally, you can have a surveyor come in and re-measure before closing escrow.
Good luck