…a water-filled hollow formed by subsidence, especially any of those due to rock salt extraction in or near Cheshire…
…a platform for producing and displaying animation and video in web browsers…
…a public gathering of complete strangers, organized via the Internet or mobile phone, who perform a pointless act and then disperse again…
…a burn caused by sudden intense heat, e.g. from a nuclear explosion…
…a card containing a small amount of information, held up for pupils to see, as an aid to learning…
…a small electronic device containing flash memory that is used for storing data or transferring it to or from a computer, digital camera, etc.…
…a gas-discharge tube used, especially in photography, to provide an electronic flash when a current is suddenly passed through it…
…a circular electronic flash tube that fits round a camera lens to give shadowless lighting of a subject near the lens, especially for macrophotography…
…fiction that is extremely brief, typically only a few hundred words or fewer in its entirety…
…freeze (food or other material) very rapidly so as to prevent the formation of ice crystals…
…a kind of memory that retains data in the absence of a power supply…
…a welding process in which the ends of two metal parts are fused by heat generated from their resistance to an electric current and applied pressure…
…a flash from a gas-discharge tube, used in high-speed photography…
…the use of a very intense flash of light to bring about decomposition or dissociation in a heated gas, usually as a means of generating and studying short-lived molecules…
