bound¹ (bound)

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[French bondir, to bounce, from Old French, to resound, perhaps from Vulgar Latin* bombitīre, from Latin bombitāre, to hum, from bombus, a humming sound, from Greek bombos.]

intransitive verb: bound·ed, bound·ing, bounds. 

1. To leap forward or upward; spring.
2. To progress by forward leaps or springs.
3. To bounce; rebound.

noun 

1. A leap; a jump.
2. A rebound; a bounce.

bound² (bound)

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[Middle English, from Old French bodne, bonde, Anglo-Norman bunde, both from Medieval Latin bodina, of Celtic origin.]

noun 

1. A boundary; a limit. Often used in the plural: Our joy knew no bounds. Your remarks exceed the bounds of reason.
2. The territory on, within, or near limiting lines: the bounds of the kingdom.

verb: bound·ed, bound·ing, bounds. 

transitive verb 

1. To set a limit to; confine: a high wall that bounded the prison yard; lives that were bounded by poverty.
2. To constitute the boundary or limit of: a city park that was bounded by busy streets.
3. To identify the boundaries of; demarcate.

intransitive verb 

To border on another place, state, or country.

bound³ (bound)

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verb 

Past tense and past participle of bind

adjective 

1. Confined by bonds; tied: bound and gagged hostages.
2. Being under legal or moral obligation: bound by my promise.
3. Equipped with a cover or binding: bound volumes.
4. Predetermined; certain: We're bound to be late.
5. Determined; resolved: She's bound to be mayor.
6. Linguistics Being a form, especially a morpheme, that cannot stand as an independent word, such as a prefix or suffix.
7. Constipated.

bound⁴ (bound)

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[Alteration of Middle English boun, ready, from Old Norse būinn past participle of būa, to get ready.]

adjective 

Headed or intending to head in a specified direction: commuters bound for home; a south-bound train.

bind (bīnd)

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[Middle English binden, from Old English bindan.]

verb: bound (bound), bind·ing, binds. 

transitive verb 

1. To tie or secure, as with a rope or cord.
2. To fasten or wrap by encircling, as with a belt or ribbon.
3. To bandage: bound up their wounds.
4. To hold or restrain with or as if with bonds.
5. To compel, obligate, or unite: bound by a deep sense of duty; bound by a common interest in sports.
6. Law To place under legal obligation by contract or oath.
7. To make certain or irrevocable: bind the deal with a down payment.
8. To apprentice or indenture: was bound out as a servant.
9. To cause to cohere or stick together in a mass: Bind the dry ingredients with milk and eggs.
10. To enclose and fasten (a book or other printed material) between covers.
11. To furnish with an edge or border for protection, reinforcement, or ornamentation.
12. To constipate.
13. Chemistry To combine with, form a chemical bond with, or be taken up by, as an enzyme with its substrate.

intransitive verb 

1. To tie up or fasten something.
2. To stick or become stuck: applied a lubricant to keep the moving parts from binding.
3. To be uncomfortably tight or restricting, as clothes.
4. To become compact or solid; cohere.
5. To be compelling or unifying: the ties that bind.
6. Chemistry To combine chemically or form a chemical bond.

noun 

1. 1. The act of binding.
   2. The state of being bound.
   3. Something that binds.
   4. A place where something binds: a bind halfway up the seam of the skirt.
2. Informal A difficult, restrictive, or unresolvable situation: found themselves in a bind when their car broke down.
3. Music A tie, slur, or brace.

phrasal verbs

bind off

To cast off in knitting.

bind over

To hold on bail or place under bond.