podstatné meno “tombstone”
 jednotné tombstone, množné tombstones
- náhrobný kameňZaregistrujte sa, aby ste videli preklady príkladových viet a jednojazyčné definície každého slova. 
 The old cemetery was filled with tombstones, each bearing the name and dates of the person buried beneath. 
- označuje symbol "∎", ktorý sa používa na označenie konca dôkazu v matematike.After carefully laying out each step of the theorem, the mathematician concluded the proof with a tombstone, signaling to readers that no further explanation was needed.