overlay

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o·ver·lay

(ō'vĕr-lā),
An addition to an already existing condition.

overlay

[ō′vərlā]
to add to an existing condition or structure; to lay on top of something.

o·ver·lay

(ō'vĕr-lā)
An addition to an already existing condition.

overlay,

n See onlay.
overlay, computer,
n a technique for bringing routines into memory from magnetic storage during processing so that several routines will occupy the same storage locations at different times. Overlay techniques are used when the total storage requirements for instructions exceed the available storage in memory.

overlay

a later component superimposed on a pre-existing state or condition.
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