To be a tiptoe, To stand a tiptoe, To stand on tiptoe or To be on tiptoe, to be awake or alive to anything; to be roused; to be eager or alert; as, to be a tiptoe with expectation.

tiptoe, a.

Being on tiptoe, or as on tiptoe; hence, raised as high as possible; lifted up; exalted; also, alert. [1913 Webster]
"Night's candles are burnt out, and jocund day
Stands tiptoe on the misty mountain tops." [1913 Webster]

"Above the tiptoe pinnacle of glory." [1913 Webster]
Noiseless; stealthy. Cowper. [1913 Webster]

Tiptoe mirth, the highest degree of mirth. Sir W. Scott.

tiptoe, v. i.

To step or walk on tiptoe. [1913 Webster]

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OXFORD DICTIONARY

tiptoe, n., v., & adv.
--n. the tips of the toes.
--v.intr. (tiptoes, tiptoed, tiptoeing) walk on tiptoe, or very stealthily.
--adv. (also on tiptoe) with the heels off the ground and the weight on the balls of the feet.

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THESAURUS

tiptoe

above, abovestairs, airward, all fours, aloft, aloof, atiptoe, be careful, be cautious, couch, crawl, crawling, creep, creeping, go on tiptoe, grovel, gumshoe, gumshoeing, high, high up, in the air, in the clouds, inch, inch along, lay wait, lie in wait, lurk, make haste slowly, nightwalk, nightwalking, on all fours, on high, on stilts, on the peak, on tippytoe, on tiptoe, over, overhead, pad, padding, prowl, prowling, pussyfoot, pussyfooting, repent, reptant, reptatorial, reptile, scrabble, scramble, shadow, sidle, sidling, skulk, skyward, slink, slinking, snake, snaking, sneak, sneaking, stalk, steal, steal along, stealing, straight up, take it easy, think twice, tip, tippytoe, tiptoeing, to the zenith, toe, up, upstairs, upward, upwards, walk on eggshells, worm, worm along, worming

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