flattop

Short definition from Wiktionary

Noun

1. 1
   A short haircut in which the hair is brushed straight up then cut flat across the top.
2. 2
   An aircraft carrier.
3. 3
   A type of stringed instrument, most often an acoustic guitar, with a flat top (as opposed to an archtop), with strings held in place with pins, and with a complex system of bracing struts on the top.
4. 4
   A grill with a flat cooking surface rather than metal bars.