1. A public announcement inviting anyone to audition, apply, or participate in something, typically in entertainment, theater, film, or employment, without requiring prior experience, connections, or references
The theater company held an open call for actors interested in the new production.
A companhia de teatro fez uma convocação aberta para atores interessados na nova produção.
2. In trading, an announcement of the opening price or trading conditions at the beginning of a market session
The stock exchange made an open call to signal the start of trading.
A bolsa de valores fez uma chamada aberta para sinalizar o início da negociação.