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WordNet (r) 3.0 (2006) (WordNet)

tiptop
adj 1: of the highest quality; "an ace reporter"; "a crack
shot"; "a first-rate golfer"; "a super party"; "played
top-notch tennis"; "an athlete in tiptop condition"; "she
is absolutely tops" [synonym: {ace}, {A-one}, {crack},
{first-rate}, {super}, {tiptop}, {topnotch}, {top-notch},
{tops(p)}]
n 1: the highest level or degree attainable; the highest stage
of development; "his landscapes were deemed the acme of
beauty"; "the artist's gifts are at their acme"; "at the
height of her career"; "the peak of perfection"; "summer
was at its peak"; "...catapulted Einstein to the pinnacle
of fame"; "the summit of his ambition"; "so many highest
superlatives achieved by man"; "at the top of his
profession" [synonym: {acme}, {height}, {elevation}, {peak},
{pinnacle}, {summit}, {superlative}, {meridian}, {tiptop},
{top}]
2: the extreme top or summit