1. Additional items, features, or software that extend the functionality of a base product or system
The software comes with several useful add-ons for enhanced productivity.
O software vem com vários complementos úteis para aumentar a produtividade.
2. Extra charges or fees added to the base price of a service or product
Be careful about add-ons when booking your hotel room.
Cuidado com os complementos ao reservar seu quarto de hotel.
3. Extensions or plugins for web browsers that modify or enhance browsing functionality
I installed several add-ons to improve my browser experience.
Instalei vários complementos para melhorar minha experiência de navegação.