The sign we label as "SOMETHING" is also commonly labeled as "SOMEONE"
or "SINGLE." The "single/something/someone" sign has many
meanings (such as "alone" or "only") that depend on the rest of your
sentence.
To do this sign, point your index finger up, have the palm pointing up and
somewhat back towards you. Move your hand in a small horizontal circle--as
if tracing a circle the size of a quarter on the underside of a table.
SINGLE / SOMEONE / SOMETHING:
Sample sentence: "Are you going steady with someone?"