crisp

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Firm but easily broken or crumbled; brittle.
• adjective Pleasingly firm and fresh.
• adjective Bracing; invigorating.
• adjective Lively; sprightly.
• adjective Conspicuously clean or new.
• adjective Marked by clarity, conciseness, and briskness.
• adjective Having small curls, waves, or ripples. Used of hair.
• intransitive verb To make or keep crisp.
• intransitive verb To become or remain crisp.
• noun Something crisp or easily crumbled.
• noun A dessert of fruit baked with a sweet crumbly topping.
• noun Chiefly British A potato chip.

from The Century Dictionary.

• To curl; twist; contract or form into waves or ringlets, as the hair; wreathe or interweave, as the branches of trees.
• To wrinkle or curl into little undulations; crimp; ripple; corrugate; pucker: as, to crisp cloth.
• To form little curls or undulations; curl.
• To become friable; crackle.
• Curled; crimpled; crimped; wrinkled; wavy; especially (of the hair), curling in small stiff or firm curls.
• In botany, curled and twisted: applied to a leaf when the border is much more dilated than the disk.
• Twisted; twisting; winding.
• Brittle; friable; breaking or crumbling into fragments of somewhat firm consistence.
• Possessing a certain degree of firmness and vigor; fresh; having a fresh appearance.
• Brisk; lively.
• Having a sharp, pleasantly acrid taste.
• Lively in expression; pithy; terse; sparkling.
• In entomology, same as crispate.
• noun A material formerly used for veils, probably similar to crape; a veil.
• noun Same as crespine. Planché.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To undulate or ripple. Cf. crisp, v. t.
• noun That which is crisp or brittle; the state of being crisp or brittle; ; specifically, the rind of roasted pork; crackling.
• transitive verb To curl; to form into ringlets, as hair, or the nap of cloth; to interweave, as the branches of trees.
• transitive verb To cause to undulate irregularly, as crape or water; to wrinkle; to cause to ripple. Cf. Crimp.
• transitive verb To make crisp or brittle, as in cooking.
• transitive verb an instrument by which hair or any textile fabric is crisped.
• transitive verb the simplest form of crisping iron.
• adjective Curling in stiff curls or ringlets.
• adjective Poetic Curled with the ripple of the water.
• adjective Brittle; friable; in a condition to break with a short, sharp fracture.
• adjective Possessing a certain degree of firmness and freshness; in a fresh, unwilted condition.
• adjective Lively; sparking; effervescing.
• adjective Brisk; crackling; cheerful; lively.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Sharp, clearly defined.
• adjective Curling in stiff curls or ringlets; as, crisp hair.
• adjective Curled with a ripple of water.
• adjective Brittle; friable; in a condition to break with a short, sharp fracture; as, crisp snow.
• adjective Possessing a certain degree of firmness and freshness; in a fresh, unwilted condition.
• adjective Of weather, air etc.: dry and cold.
• adjective of movement, etc. Quick and accurate.
• adjective text, etc. Brief and to the point. (Esp. in make it crisp.)
• adjective Lively; sparking; effervescing.