1. openly and publicly, during the day when everything is visible; without concealment or secrecy
The theft occurred in broad daylight on a busy street.
O roubo ocorreu em plena luz do dia numa rua movimentada.
2. obviously; in a way that is impossible to hide or deny
He lied to everyone in broad daylight about his whereabouts.
Ele mentiu para todos em plena luz do dia sobre seu paradeiro.