Definitions

1. noun

a mathematical curve or shape, especially a curve that is S-shaped, resembling the Greek letter sigma.

“The sigmoid curve showed a clear trend in the data.”

2. adjective

shaped like the Greek letter sigma, or resembling an S.

“The sigmoid shape of the bridge allowed it to withstand strong winds.”

3. adverb

in a sigmoid manner.

“The sigmoid growth of the company was impressive.”