| In random sequence | 18 |
| In ranks | 8 |
| In rapid tempo | 14 |
| In rapid-fire succession | 24 |
| In rapture | 10 |
| In re | 5 |
| In re: | 6 |
| In re: Abbr. | 12 |
| In readiness | 12 |
| In real time | 12 |
| In real trouble | 15 |
| In reality | 10 |
| In reality, it can't be flown | 33 |
| In recent days | 14 |
| In recent memory | 16 |
| In recent times | 15 |
| In reference to | 15 |
| In regard | 9 |
| In regard to | 12 |
| In regular installments | 23 |
| In relation to | 14 |
| In relation to, for short | 25 |
| In relief | 9 |
| In remembrance of the past | 26 |
| In reply | 8 |
| In repose | 9 |
| In reserve | 10 |
| In reserve (slang) | 18 |
| In reserve Weakerthans tune? | 28 |
| In reserve, as money | 20 |
| In reserve, or cinched | 22 |
| In respect to, with ''of'' | 42 |
| In response to a challenge | 26 |
| In response to declining sales, the photojournalism magazine launched a campaign to turn the short-term subscriber into a ___ | 125 |
| In retreat | 10 |
| In reverie | 10 |
| In reverse | 10 |
| In reverse position | 19 |
| In revolution | 13 |
| In rhythm | 9 |
| In rich supply | 14 |
| In right now | 12 |
| In ringing fashion | 18 |
| In rock, it may be heavy | 24 |
| In romance poetry, a frequent rhyme for June | 44 |
| In romantic pursuit | 19 |
| In Rome, she was Minerva | 24 |
| In roulette, 19-36 | 18 |
| In round figures | 16 |
| In round numbers | 16 |
| In rows | 7 |
| In ruins | 8 |
| In safekeeping | 14 |
| In satisfactory condition | 25 |
| In school, it sometimes counts | 30 |
| In scoring position | 19 |
| In scoring position, maybe | 26 |
| In scoring position, perhaps | 28 |
| In search of | 12 |
| In search of a masseur, perhaps | 31 |
| In search of information | 24 |
| In search of prey | 17 |
| In Search Of: Central European guy who swings both ways; hoping to receive a ___ | 80 |
| In Search Of: Ladyfriend for a foreign exchange student in Yorkshire - where can I find my ___ ? | 96 |
| In Search Of: Southeast Asian boyfriend; maybe you can work out as my ___ | 73 |
| In season | 9 |
| In seclusion | 12 |
| In second place, say | 20 |
| In secret | 9 |
| In secret language | 18 |
| In secret or in private | 23 |
| In sections | 11 |
| In sections, as a window | 24 |
| In seemingly constant motion | 28 |
| In self-contained units | 23 |
| In sequence | 11 |
| In serious need of activity | 27 |
| In sets | 7 |
| In sets of 24 sheets | 20 |
| In seventh heaven | 17 |
| In shabby condition | 19 |
| In shabby shape | 15 |
| In shackles | 11 |
| In shadow | 9 |
| In Shakespeare, the star in "The star is fall'n" | 62 |
| In shambles | 11 |
| In shape | 8 |
| In shape, as a boxer | 20 |
| In shares | 9 |
| In shipshape fashion | 20 |
| In shock | 8 |
| In shock, to Coleridge | 22 |
| In short | 8 |
| In short order | 14 |
| In short supply | 15 |
| In short, it's a bout done | 30 |
| In shorter supply | 17 |
| In shouting range | 17 |
| In show position | 16 |
| In shreds | 9 |