Wiktionary
fan out
vb. to spread out into the shape of a fan
WordNet
fan out
v. move outward; "The soldiers fanned out" [syn: diffuse, spread, spread out]
Usage examples of "fan out".
He straightened up holding the piece, to find Zamben holding the fan out to him.
Knowing that even one of its big plasma balls would take out an entire shielding trio, Luke ordered his wings to fan out.