if a group of people fan out, they move forwards and apart in a straight line
to spread objects or parts out, often in the shape of a semi-circle
Her long dark hair fanned out across the pillow.
Officers fanned out across the field to look for clues.
Their tails often fan out when they soar but otherwise are narrow in flight.
fans out
fanning out
fanned out
There is no origin for this phrasal verb
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