ample

1. A fully sufficient or abundant quantity of; enough or more than enough.

   We have ample time to finish the task.

   4 more examples

   It is a large house with ample space for all of us.

   …a broad and ample road, whose dust is gold…

   1667, John Milton, Paradise Lost (Book II)^(https://en.wikisource.org/wiki/Paradise_Lost_(1667)/Book_II)

   …a line of wooden troughs supplies ample water for irrigation.

   1862, Richard F. Burton, The City of the Saints

   …possesses an ample supply of water-power for industrial purposes.

   1911, Various (ed. Hugh Chisholm), 1911 Encyclopædia Britannica/Article on Sweden

2. A quantity (of something) that is fully sufficient; plenty.

   We don't need any more. We already have ample.

comparative ampler · superlative amplest

1. Large; great in size, extent, capacity, or bulk; for example spacious, roomy or widely extended.

   She has a very ample bosom.

   2 more examples

   We have an ample supply of water

   [H]e was satisfied that Alice yet lived; he hoped she might yet escape and return. […] He enriched Mrs. Jones for life, in gratitude for her vindication of his lost and early love: he promised the amplest rewards for the smallest clue.

   1837, [Edward Bulwer-Lytton], chapter XI, in Ernest Maltravers […] , volume I, London: Saunders and Otley, […], →OCLC, book I, page 111

2. Very adequate.

   It was pointed out to me that the security was ample, and as I had no practical knowledge of house-valuing there was nothing to be gained by inspecting it.

   1923, Ernest Bramah [pseudonym; Ernest Brammah Smith], “(please specify the page)”, in The Eyes of Max Carrados, London: Grant Richards, →OCLC

3. Not contracted or brief; not concise; extended; diffusive

   an ample story