- 1[only before noun] involving punishment by death a capital offense letter
- 2[only before noun] (of letters of the alphabet) having the form and size used at the beginning of a sentence or a name English is written with a capital “E.” compare lowercase
- 3(old-fashioned) excellent Idioms
punishment
used to emphasize that a word has a stronger meaning than usual in a particular situation He was romantic with a capital R.
Check pronunciation: capital