noun

1. 1. a cutting tool, of various shapes and sizes and worked by hand or machinery, consisting essentially of a thin blade or disk of metal, usually steel, the edge of which is a series of sharp teeth
   2. any of various tools or devices somewhat like this but with a sharp edge instead of teeth
2. a machine for operating a saw or saws

Etymology: ME sawe < OE sagu, akin to Ger säge, Du zaag < IE base *sek-, to cut, > L secare, to cut, OE seax, knife

transitive verb sawed, sawed or Chiefly Brit.sawn, sawing saw′·ing

1. to cut or divide with a saw
2. to shape or form with a saw
3. to make sawlike cutting motions through (the air, etc.)
4. to operate or produce with a to-and-fro motion suggestive of that used in working a saw to saw a knife through meat, to saw a tune on a fiddle

intransitive verb

1. to cut with or as with a saw or as a saw does
2. to be cut with a saw wood that saws easily
3. to make sawlike cutting motions