ample

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Of large or great size, amount, extent, or capacity: an ample living room. See Synonyms at spacious.
2. adj. Large in degree, kind, or quantity: an ample reward.
3. adj. More than enough: ample evidence.
4. adj. Fully sufficient to meet a need or purpose: had ample food for the party. See Synonyms at plentiful.

Century Dictionary and Cyclopedia

1. Large in dimensions; of great size, extent, capacity, or bulk; wide; spacious; extended.
2. Large in kind or degree; having full scope or extent; copious; unrestricted; unrestrained: as, an ample narrative; to give ample praise, or do ample justice.
3. Fully sufficient for any purpose, or for the purpose specified; abundant; liberal; plentiful: as, ample provision for the table.
4. Synonyms Ample, Copious, Plenteous, spacious, roomy, extensive, extended, wide, capacious, abundant, sufficient, full, enough, unrestricted, plenary, unstinted. (See lists under abundant and large.) Ample, in its more common uses, has reference to the sufficiency of the supply for every need; copious carries with it the idea of the unfailingness of the source; while plenteous usually indicates largeness of quantity in actual possession: as, ample stores or resources; a copious supply of materials; a plenteous harvest.

Wiktionary

1. adj. Large; great in size, extent, capacity, or bulk; spacious; roomy; widely extended.
2. adj. Fully sufficient; abundant; liberal; copious; as, an ample fortune; ample justice.
3. adj. Not contracted or brief; not concise; extended; diffusive; as, an ample narrative.

GNU Webster's 1913

1. adj. Large; great in size, extent, capacity, or bulk; spacious; roomy; widely extended.
2. adj. Fully sufficient; abundant; liberal; copious.
3. adj. Not contracted of brief; not concise; extended; diffusive.

WordNet 3.0

1. adj. fairly large
2. adj. more than enough in size or scope or capacity
3. adj. affording an abundant supply