Version 1: OUTSIDE
This is generally used as an adjective that means "situated on or pertaining
to the outside; exterior; external." Some people also use this
version as a noun to mean "outdoors." But there is another sign that
means "outdoors." See further below.




Version 2: OUTSIDE / OUTOORS
This version uses a quick repeated movement
of "to go out." The repeated movement makes it a noun. (If you were to
do this movement a little larger, with a bit more of a pause between
repetitions, it could mean "to go out repeatedly.") But the way I'm
using it here means: "outside."




"GO-OUT" This sign means "to go out." It is very similar to
the sign LEAVE.
I do "GO-OUT" just a bit higher, and the palm orientation at the end of the
sign "GO-OUT" is sort of facing up.



General sign for "OUT."
Used in contexts such as, "I took it out."
(Yah...I know my hair, what little I have, is mussed. Whatever. Pay
attention to my hands.)



Variation: EXIT
(to leave the inside).
This sign is sometimes used to mean "to have left." The use of the
base hand indicates having been "in." Walls.
Think of this sign as meaning, "be inside and then leave."
Note: The movement is slightly forward and off to the side. The
handshape changes from a loose hand to an "and" hand (squished "O").



OUT/EXIT: animation
Notice this next variation starts with an "open" hand and closes as it moves
out. This open then closed movement is related to influence from the concept
of "leave." For more info, see: "LEAVE"

For outside, I use only one handed sign in a repeated motion to show outside. He is outside. A variation of the sign not repeated combined with a flat palm as shown in your picture is an adjective to show something's out or to go out. My preference is for the verb to go out-- one hand sign, instead of two.
Dear ASL Teacher,
I agree that the one handed sign for "outside" is a widely used sign and
needs to be included on the "out" page under the heading of "outside."
There evidence though that the two-handed variation is also in use to
mean "outside."
For example as of this writing there is a two handed version at Michigan
State University's website that is specifically labeled as "outdoors."
American Sign Language University ™ ASL resources by Lifeprint.com © Dr. William Vicars