From The Collaborative International Dictionary of English v.0.48 :
airfield \air"field`\ ([^a]r"f[=e]ld`), n.
1. 1 a place where planes take off and land; an airport; --
usually used of airports other than those with regularly
sheduled commercial flights, such as those at military
bases or small fields for private aircraft.
Syn: landing field, flying field, field
[WordNet 1.5]
From WordNet (r) 3.0 (2006) :
airfield
n 1: a place where planes take off and land [syn: airfield,
landing field, flying field, field]