WordNet sense 1 (an angular or rounded shape made by folding):

bend, crease, crimp, flexure, plication

WordNet sense 2 (a geological process that causes a bend in a stratum of rock):

folding

WordNet sense 3 (a group of people who adhere to a common faith and habitually attend a given church):

congregation, faithful

WordNet sense 4 (a group of sheep or goats):

flock

WordNet sense 5 (a folded part (as in skin or muscle)):

plica

WordNet sense 6 (a pen for sheep):

sheepfold, sheepcote, sheep pen

WordNet sense 7 (cease to operate or cause to cease operating):

close, close up, close down, shut down

WordNet sense 8 (confine in a fold, like sheep):

pen up

WordNet sense 9 (bend or lay so that one part covers the other):

turn up, fold up