Definition from Wiktionary, the free dictionary
- (obsolete, dialect) supple
- Ye think our questions to evade,
- An weel ye ken that soople trade,
- But Saunder's isna just the blade,
- That ye can flam wi' butter. — "Anither New Sang" 
- (dialect) suitable
- ‘He's a right scholar, can write so small you can scarcely see it; younger nor I am, and more soople, sir, oh, far more soople.’ — Patrick O'Brian, "Master and Commander"