In or into a position in which the hands are on the hips and the elbows are bowed outward: children standing akimbo by the fence.
Placed in such a way as to have the hands on the hips and the elbows bowed outward: children standing with arms akimbo.
Being in a bent, bowed, or arched position: "There he remained, dead to the world, limbs akimbo, until we left” ( Alex Shoumatoff).
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.