If you received it in change or got it from a bank mixed in with other bills of different dates, or it shows any wear, that's pretty much the definition of "circulated". If the bill is crisp and unfolded, and was taken from a Federal Reserve bundle, it's almost certainly uncirculated.
If you received it at a store or anywhere other than a bank, by definition it's now circulated. If you got it from a bank and it's crisp and unfolded, it's most likely uncirculated.
It is worth about $5000 Uncirculated
If it has any signs of use then it is circulated. An uncirculated bill is so crisp and new that it doesn't seem real. Usually you can get them at the bank or buy them directly from the mint.
I bought the commemorative bill for about $10 recently.
$2.00
For any bill, not just silver certificates, the term uncirculated means it's never been spent. If a bill shows any wear, it's a good bet that it's been used to buy something. However if a bill was only used once and still retains its crispness it may be difficult to distinguish it from an uncirculated specimen. In these cases the bill may be graded as "almost uncirculated", pending inspection by an experienced grader.
About $4
About $3.00
A nice, crisp uncirculated note has a value of about $15, IF you can find a buyer.
"Uncirculated" simply means "never been spent and in change" so if you have a new coin or bill (banknote) from the bank or a cash machine, it's considered to be uncirculated. As soon as it's spent at a store or put in a vending machine it's been in circulation. Of course if you have to prove that an item is uncirculated, that's more difficult. There are companies that get coins and bills directly from banks and resell them, and both the Mint (coins) and BEP (bills) will sell you uncirculated examples of their products. Then you know they're truly never circulated, but you'll have to pay extra for that assurance.
A uncirculated coin has no wear at all, but may have contact marks.
20,000,000