ˈsi:lɪŋ n. 1 a
the upper
interior surface of a
room or
other similar compartment. b the
material forming
this. 2 an upper
limit on prices, wages,
performance, etc. 3 Aeron. the
maximum altitude a
given aircraft can
reach. 4 Naut. the
inside planking of a ship's
bottom and sides. [ME celynge, siling, perh. ult. f. L caelum
heaven or celare hide]