Definition: In what way or manner; by what means; used to ask about the condition or quality of something.
Variation, still used today in the 21st century. Clearly, it has been used for a very long time; it was seen signing by George Veditz in his 1913 film, "The Preservation of American Sign Language".
First 100 words.
As you feel more comfortable with the first few hundreds of ASL signs, progress further with your vocabulary and learn signing more.