To record or enrol information or a person's details formally in an official list or database. You must register your new address with the local authorities within fourteen days.
To express or convey a feeling or opinion. His face registered surprise when he heard the unexpected news.
To detect or show a reading on a measuring instrument. The thermometer registered a temperature of 100 degrees Fahrenheit.
To achieve or attain a particular level or amount. The team registered their first win of the season after a tough match.