| In any other way | 16 |
| In any respect | 14 |
| In any way | 10 |
| In any way at all | 17 |
| In any way possible | 19 |
| In any way whatever | 19 |
| In any way, in dialect | 22 |
| In any way, informally | 22 |
| In any way, shape or form | 25 |
| In any way. | 11 |
| In any weather | 14 |
| In any ___ | 10 |
| In apple pie order | 18 |
| In apple-pie order | 18 |
| In April or May | 15 |
| In armed conflict | 17 |
| In armor | 8 |
| In arrears | 10 |
| In art, an underlying image that's been painted over | 56 |
| In ascent | 9 |
| In association (with) | 21 |
| In association with | 19 |
| In attendance | 13 |
| In Australia her name is Karen | 30 |
| In awe | 6 |
| In awe, visibly | 15 |
| In awe, visually | 16 |
| In awhile | 9 |
| In back | 7 |
| In back of | 10 |
| In back of the barracks? | 24 |
| In bad company, per Bierce | 26 |
| In bad company, to Ambrose Bierce | 33 |
| In bad condition | 16 |
| In bad faith | 12 |
| In bad health | 13 |
| In bad shape | 12 |
| In bad ___ | 10 |
| In bad ___ (out of favor) | 25 |
| In balance | 10 |
| In baroque style | 16 |
| In Bartlett's, e.g. | 23 |
| In base 8 | 9 |
| In base eight | 13 |
| In baseball, a good one is low | 30 |
| In baseball, he's The Man | 29 |
| In battle | 9 |
| In bed all day, maybe | 21 |
| In bed, maybe | 13 |
| In being | 8 |
| In being: L. | 12 |
| In best shape | 13 |
| In better condition, to collectors | 34 |
| In better fighting shape | 24 |
| In better health | 16 |
| In better order | 15 |
| In better physical condition | 28 |
| In better shape | 15 |
| In better taste | 15 |
| In between | 10 |
| In between jobs | 15 |
| In between ports | 16 |
| In between the mis and the sols | 31 |
| In between, quaintly | 20 |
| In big bits | 11 |
| In big trouble | 14 |
| In big trouble, slangily | 24 |
| In billiards, what the English call English | 43 |
| In biology, it's applied to a genus | 39 |
| In bits and pieces | 18 |
| In bits and pieces, as documents | 32 |
| In bloom | 8 |
| In bluenosed fashion | 20 |
| In bondage | 10 |
| In boots, e.g. | 14 |
| In Boston, they are Red | 23 |
| In Boston, this makes a god out of a guard | 42 |
| In both directions | 18 |
| In bounds | 9 |
| In bounds? | 10 |
| In boxing shape | 15 |
| In brackets | 11 |
| In braids | 9 |
| In bridge, diamonds or clubs | 28 |
| In bridge, the player on the dealer's right | 47 |
| In brief | 8 |
| In brilliant fashion | 20 |
| In Britain they're called thieves' kitchens | 51 |
| In Britain, 39.37 inches | 24 |
| In British lingo, it's stingo | 33 |
| In broad and noble style | 24 |
| In broad daylight | 17 |
| In brogans, e.g. | 16 |
| In Buffett's league | 23 |
| In bundles | 10 |
| In bundles, as hay | 18 |
| In business | 11 |
| In business as of | 17 |
| In business right now | 21 |
| In bygone days | 14 |