📒 only one
📒 intended to be used by only one person
📒 not married or having a romantic relationship with somebody
📒 a single ticket, etc. can be used for travelling to a place but not back again
📒 used to emphasize that you are referring to one particular person or thing on its own
📒 immediately; with only a quick look
📒 in one single attempt or try
📒 (in) one line, one behind the other