| Sign- -- (farewells) | 20 |
| Sign-bearer in an airport, e.g. | 31 |
| Sign-enhancing gas | 18 |
| Sign-language developer | 23 |
| Sign-language inventor | 22 |
| Sign-language pioneer | 21 |
| Sign-making aid | 15 |
| Sign-making aids | 16 |
| Sign-making device | 18 |
| Sign-making tool | 16 |
| Sign-off | 8 |
| Sign-off a la Clement Moore | 27 |
| Sign-off at proms | 17 |
| Sign-off for Spanish spies? | 27 |
| Sign-off from there | 19 |
| Sign-off in texting or cyber speak | 34 |
| Sign-off of a sort | 18 |
| Sign-off word | 13 |
| Sign-off word, with "Yours" | 37 |
| Sign-off words | 14 |
| Sign-on requirement, often | 26 |
| Sign-painter's patterns | 27 |
| Sign-reading site | 17 |
| Sign-up | 7 |
| Sign-up book for races? | 23 |
| Sign: Lat. | 10 |
| Sign: Part 2 | 12 |
| Sign: Part 3 | 12 |
| Sign: ped -- | 12 |
| Signage gas | 11 |
| Signal | 6 |
| Signal "Come here," say | 33 |
| Signal "Hello!" | 25 |
| Signal "Hi!" or "Bye!" | 42 |
| Signal "Hi!" to with a hand | 37 |
| Signal a musician | 17 |
| Signal after tattoo | 19 |
| Signal again | 12 |
| Signal again, as an actor | 25 |
| Signal agreement | 16 |
| Signal agreement, in a way | 26 |
| Signal amplifier | 16 |
| Signal an actor | 15 |
| Signal an OK | 12 |
| Signal approval | 15 |
| Signal at a pagoda, maybe | 25 |
| Signal at a séance, maybe | 28 |
| Signal at Christie's | 24 |
| Signal at Sotheby's | 23 |
| Signal at sunrise | 17 |
| Signal at the end of philosophy class? | 38 |
| Signal “Hello!” | 23 |
| Signal bell | 11 |
| Signal booster | 14 |
| Signal box controls | 19 |
| Signal by hand | 14 |
| Signal caller | 13 |
| Signal callers: Abbr. | 21 |
| Signal consent | 14 |
| Signal converter | 16 |
| Signal disturbance | 18 |
| Signal enhancer | 15 |
| Signal fires | 12 |
| Signal flag | 11 |
| Signal flags, at sea | 20 |
| Signal flare | 12 |
| Signal flares | 13 |
| Signal for a fastball | 21 |
| Signal for a good samaritan | 27 |
| Signal for a parley with a foe | 30 |
| Signal for a programmer's jump | 34 |
| Signal for a swig | 17 |
| Signal for aid | 14 |
| Signal for an act to end | 24 |
| Signal for attention | 20 |
| Signal for help | 15 |
| Signal for immediate assistance | 31 |
| Signal for silence | 18 |
| Signal for the USCG | 19 |
| Signal from a man in a trenchcoat | 33 |
| Signal from a note passer | 25 |
| Signal from a sinking ship | 26 |
| Signal from someone in trouble | 30 |
| Signal from the third base coach, maybe | 39 |
| Signal from the Titanic: April, 1912 | 36 |
| Signal giver | 12 |
| Signal givers | 13 |
| Signal hello or goodbye | 23 |
| Signal in a courtroom | 21 |
| Signal in many homes, nowadays | 30 |
| Signal interference | 19 |
| Signal light | 12 |
| Signal lights | 13 |
| Signal meaning ''help'' | 39 |
| Signal of a kind | 16 |
| Signal of a sort | 16 |
| Signal of approval | 18 |
| Signal of comprehension | 23 |
| Signal of imminent attack | 25 |
| Signal on a screen | 18 |