A latch is a type of door or window fastener. Latch may also refer to: Technology Latch, a circuit used to store information, see Flip-flop (electronics) Index lock, a lock on a data-structure LATCH (Lower Anchors and Tethers for Children), a mounting system for child safety seats Other uses Latch (breastfeeding), a breastfeeding baby's connection "Latch" (song), a 2012 song by Disclosure featuring Sam Smith See also Latching relay, a relay with two relaxed states (bistable) Latching switch, a switch that maintains its state after being activated Latching (networking), in computer networking Laches (disambiguation)