From Longman Dictionary of Contemporary Englishblock capitalsˌblock ˈcapitals noun [plural] SLAWRITEletters in their large form, such as A, B, C, rather than a, b, c SYN capital letters Complete the form in block capitals.
Examples from the Corpus
block capitals• Just fill in the coupon in block capitals and send to Beaverbrooks the Jewellers at the address below. 