From The Collaborative International Dictionary of English v.0.48:
Skim \Skim\, a. Contraction of Skimming and Skimmed. [1913 Webster]
Skim coat, the final or finishing coat of plaster.
Skim colter, a colter for paring off the surface of land.
Skim milk, skimmed milk; milk from which the cream has been taken. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Skim \Skim\ (sk[i^]m), v. t. [imp. & p. p. Skimmed (sk[i^]md); p. pr. & vb. n. Skimming.] [Cf. Sw. skymma to darken. [root]158. See Scum.] 1. To clear (a liquid) from scum or substance floating or lying thereon, by means of a utensil that passes just beneath the surface; as, to skim milk; to skim broth. [1913 Webster]
2. To take off by skimming; as, to skim cream. [1913 Webster]
3. To pass near the surface of; to brush the surface of; to glide swiftly along the surface of. [1913 Webster]
Homer describes Mercury as flinging himself from the top of Olympus, and skimming the surface of the ocean. --Hazlitt. [1913 Webster]
4. Fig.: To read or examine superficially and rapidly, in order to cull the principal facts or thoughts; as, to skim a book or a newspaper. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Skim \Skim\, v. i. 1. To pass lightly; to glide along in an even, smooth course; to glide along near the surface. [1913 Webster]
Not so when swift Camilla scours the plain, Flies o'er the unbending corn, and skims along the main. --Pope. [1913 Webster]
2. To hasten along with superficial attention. [1913 Webster]
They skim over a science in a very superficial survey. --I. Watts. [1913 Webster]
3. To put on the finishing coat of plaster. [1913 Webster]