| In total accord | 15 |
| In total agreement (with) | 25 |
| In toto | 7 |
| In touch with who one is | 24 |
| In tow | 6 |
| In town | 7 |
| In traffic, say | 15 |
| In transit | 10 |
| In transit, maybe | 17 |
| In tribute to | 13 |
| In trig, sine's reciprocal | 30 |
| In trig, the reciprocal of sin | 30 |
| In trim | 7 |
| In triplicate, a Seinfeld catchphrase | 37 |
| In trouble | 10 |
| In trouble for being baseless? | 30 |
| In trouble, in slang | 20 |
| In trouble, in the Army | 23 |
| In trouble, with "off" | 32 |
| In trustworthy fashion | 22 |
| In truth | 8 |
| In truth, in Shakespeare | 24 |
| In truth, old-style | 19 |
| In tune | 7 |
| In tune with current events | 27 |
| In Turkey, 100 piasters | 23 |
| In turmoil | 10 |
| In two | 6 |
| In two different places | 23 |
| In two parts | 12 |
| In two pieces, like two-by-fours | 32 |
| In two pieces, maybe | 20 |
| In two places | 13 |
| In two places at once? | 22 |
| In two shakes | 13 |
| In two ways | 11 |
| In two, say | 11 |
| In two: Comb. form | 18 |
| In type | 7 |
| In typical fashion | 18 |
| In uncharted territory, so to speak | 35 |
| In under the tag | 16 |
| In underhanded fashion | 22 |
| In unfamiliar territory | 23 |
| In unfamiliar territory, maybe | 30 |
| In unison | 9 |
| In unison with as | 18 |
| In unison, at the Met | 21 |
| In unison, in a way | 19 |
| In unison, in music | 19 |
| In unison, in scores | 20 |
| In unison, musically | 20 |
| In unison, on a score | 21 |
| In unison, on scores | 20 |
| In unison: Mus. | 15 |
| In unkind style | 15 |
| In unruffled style | 18 |
| In up to one's neck | 23 |
| In UPS's hands | 18 |
| In use | 6 |
| In use, as a phone line | 23 |
| In use, as an apartment building | 32 |
| In utero | 8 |
| In utero surgery site | 21 |
| In utter confusion | 18 |
| In vain | 7 |
| In various places | 17 |
| In various spots | 16 |
| In Vegas, it's a natural | 28 |
| In verse, "His cheeks were like roses, his nose like a cherry!" | 73 |
| In vertical position at sea | 27 |
| In very high demand | 19 |
| In very high dudgeon | 20 |
| In very little pieces | 21 |
| In very poor condition | 22 |
| In very short order | 19 |
| In view | 7 |
| In vigorous health | 18 |
| In vino __ | 10 |
| In vino ___ | 11 |
| In violation of social norms | 28 |
| In vitro cells | 14 |
| In vitro items | 14 |
| In vitro items, perhaps | 23 |
| In vitro needs | 14 |
| In vogue | 8 |
| In vogue again | 14 |
| In vogue, in the '60s | 25 |
| In vogue, or words after "all" | 40 |
| In wait | 7 |
| In waiting | 10 |
| IN WALKED ___ | 13 |
| In walking distance, maybe | 26 |
| In want | 7 |
| In want of | 10 |
| In want of liniment | 19 |
| In want of the wherewithal | 26 |
| In want of water | 16 |
| In what country are Chinese gooseberries produced? | 50 |
| In what country are Panama hats made? | 37 |