Merriam-Webster Collegiate Dictionary - shore

 I. noun  Usage: often attributive  Etymology: Middle English, from Old English *scor; akin to Middle Low German schor foreland and perhaps to Old English scieran to cut — more at shear  Date: 14th century  1. the land bordering a usually large body of water; specifically coast  2. a boundary (as of a country) or an area within a boundary — usually used in plural immigrated to these ~s  3. land as distinguished from the sea shipboard and ~ duty  II. noun  Etymology: Middle English; akin to Middle Dutch score prop, Middle Low German schore  Date: 14th century a prop for preventing sinking or sagging  III. transitive verb  (~d; shoring)  Date: 14th century  1. to support by a ~ ; prop  2. to give support to ; brace — usually used with up trying to ~ up his claim