From later (“see you later”) +‎ -s (hypocoristic suffix). Compare toodles and bye-byes.

• (General American) IPA^(key): /ˈleɪtɚz/

  • Audio (General American):

    (file)

• (Received Pronunciation) IPA^(key): /ˈleɪtəz/

laters

1. (slang) See you later; an expression used at parting.
   • 2001, Anna Maxted, Getting Over It [1]:

     But all she says is “Ring us if you want to go out this week. Laters!” and puts the phone down.

   • 2004, J J Connolly, Layer Cake [2]:

     ‘Shanks,’ says Trevor into his mobile, ‘we just gone down a snake. I’ll see ya tomorrow, laters.’

   • 2004, Thomas Neradin, Last Train [3]:

     You know where the money is and how much. Tell him the usual. Yep. Laters.

• Laster, ratels, alters, stelar, Tarsle, talers, streal, staler, estral, alerts, tarsel, resalt, slater, Slater, Salter, tralse, strale, laster, Trelas, artels, salter

laters

1. indefinite genitive plural of lat

• alster, arslet, laster, salter