A bursting inwards, as of a vessel from which the air has been exhausted; -- contrasted with explosion.

The inward-moving detonation wave cause by detonation of explosives arrayed spherically around a core; -- a technique used in atomic bombs to compress fissionable material to allow a chain reaction time to produce an explosion of the fissionable material.

Bursting inward.

A sudden compression of the air in the mouth, simultaneously with and affecting the sound made by the closure of the organs in uttering p, t, or k, at the end of a syllable (see Guide to Pronunciation, §§159, 189); also, a similar compression made by an upward thrust of the larynx without any accompanying explosive action, as in the peculiar sound of b, d, and g, heard in Southern Germany.

Compression of air between the closed glottis and the closed oral and nasal passages, forming the voiceless consonants "p", "t" and "k".

Tracing a component and its requirements upward through successively higher levels of a bill of material. The opposite of exploding a top-level item down to individual components.

therapeutic technique whereby clients imagine and relive aversive scenes associated with their anxiety; the idea is that with repeated exposure in a safe environment, the aversive stimulus will lose its ability to make the person anxious.

a quiet thing, quieter than the fireworks with their loud pops and blasts and huge ba-booms

Implosion is a science fiction novel by D. F. Jones, published in 1967.

a return from the boundary limits of expansion, contracting at great speed into a new, and more stable, state of affairs