15-letter words starting with on

on (the) record — recorded; publicly or officially declared or known
on a knife-edge — To be on a knife-edge means to be in a situation in which nobody knows what is going to happen next, or in which one thing is just as likely to happen as another.
on a razor edge — in an extremely precarious state
on a shoestring — If you do something or make something on a shoestring, you do it using very little money.
on an even keel — Nautical. a central fore-and-aft structural member in the bottom of a hull, extending from the stem to the sternpost and having the floors or frames attached to it, usually at right angles: sometimes projecting from the bottom of the hull to provide stability.
on heat/in heat — When a female animal is on heat in British English, or in heat in American English, she is in a state where she is ready to mate with a male animal, as this will probably result in her becoming pregnant.
on o's haunches — If you get down on your haunches, you lower yourself towards the ground so that your legs are bent under you and you are balancing on your feet.
on one's honour — on the pledge of one's word or good name
on one's mettle — roused to putting forth one's best efforts
on one's uppers — higher, as in place, position, pitch, or in a scale: the upper stories of a house; the upper register of a singer's voice.
on prescription — If a medicine is available on prescription, you can only get it from a chemist or pharmacist if a doctor gives you a prescription for it.
on short notice — with little warning
on the contrary — opposite in nature or character; diametrically or mutually opposed: contrary to fact; contrary propositions.
on the decrease — decreasing
on the heels of — the back part of the human foot, below and behind the ankle.
on the increase — growing, increasing
on the one hand — You use on the one hand to introduce the first of two contrasting points, facts, or ways of looking at something. It is always followed later by on the other hand or 'on the other'.
on the order of — an authoritative direction or instruction; command; mandate.
on the point of — a sharp or tapering end, as of a dagger.
on the port bow — within 45 degrees to the port of straight ahead
on the qui vive — on the qui vive, on the alert; watchful: Special guards were on the qui vive for trespassers.
on the track of — If you are on the track of someone or something, you are trying to find them, or find information about them.
on the trail of — If you are on the trail of a person or thing, you are trying hard to find them or find out about them.
on the verge of — about to
on/off the mark — If something is off the mark, it is inaccurate or incorrect. If it is on the mark, it is accurate or correct.
once in a while — at one time in the past; formerly: I was a farmer once; a once powerful nation.
one for his nob — the call made with this jack, scoring one point
one of the boys — If a man is described as one of the boys, he is accepted by a group of male friends who do things that are thought of as typically masculine.
one's last hour — the time of one's death
one-dimensional — having one dimension only.
one-night stand — a single performance in one locale, as by a touring theatrical company, before moving on to the next engagement.
one-two (punch) — a sequence of two quick punches, esp. a jab with the left hand followed at once by a hard blow with the right
oneirocriticism — the art of interpreting dreams.
ones complement — A system used in some computers to represent negative numbers. To negate a number, each bit of the number is inverted (zeros are replaced with ones and vice versa). This has the consequence that there are two reperesentations for zero, either all zeros or all ones. ... 000...00011 = +3 000...00010 = +2 000...00001 = +1 000...00000 = +0 111...11111 = -0 111...11110 = -1 111...11101 = -2 111...11100 = -3 ... Naive logic for ones complement addition might easily conclude that -0 + 1 = +0. The twos complement avoids this by using all ones to represent -1.
onomasiological — the study of the means of expressing a given concept.
onward progress — progress that advances or improves (a situation, etc)
onychocryptosis — a form of nail disease in which nails are ingrown

On this page, we collect all 15-letter words starting with ON. It’s easy to find right word with a certain length. It is the easiest way to find 15-letter word that beginning with ON to use in Scrabble or Crossword puzzles.

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