This sign refers to "off" as in "Get off the couch." Another way to sign this is the lexicalized #OFF sign. For turning off lights, for example, you would use the LIGHT-OFF sign with both hands in a 5 handshape palms facing down and moving to an AND handshape to show lights turning off.
OFFICE
OFTEN
OK
OLD
ON
ON LEFT WALL
ON RIGHT WALL
ONCE A MONTH
ONCE A WEEK
Once a week in May my grandfather watches his favorite television show.
These are numbers that show the order of something (for example: winners in a race). Numbers 1st-9th are shown by forming the handshape of the number and twisting the wrist. Every number after 9th is shown by the number + fingerspelling T-H. Even though English gives a number such as 22 an "nd" ending to make 22nd, all numbers after 9th in ASL use "T-H" afterward.
1st-9th = NUMBER + (Wrist Twist) 9th+ = NUMBER + T-H
