n.
Pronunciation: ˌ s ē -m ē - ' ō -s ə s, ˌ se-m ē -, ˌ s ē - ˌ m ī -
Function: noun
Etymology: New Latin, from Greek s ē mei ō sis observation of signs, from s ē meioun to observe signs, from s ē meion
Date: circa 1907
: a process in which something functions as a sign to an organism