Witness (mathematics)
WordNet
noun
(1) Testimony by word or deed to your religious faith
(2) A close observer; someone who looks at something (such as an exhibition of some kind)
"The spectators applauded the performance"
"Television viewers"
"Sky watchers discovered a new star"
(3) Someone who sees an event and reports what happened
(4) (law) a person who attests to the genuineness of a document or signature by adding their own signature
(5) (law) a person who testifies under oath in a court of law
verb
(6) Be a witness to
"She witnessed the accident and had to testify in court"
(7) Perceive or be contemporaneous with
"We found Republicans winning the offices"
"You'll see a lot of cheating in this school"
"The 1960's saw the rebellion of the younger generation against established traditions"
"I want to see results"