Word: overlay
Part of speech: Noun
Syllables: o
ver
lay
Definition: A block of program code that is loaded over something previously loaded, so as to replace the functionality.
Morphemes:
Affix: over-
Language: en
PoS: Prefix
Meaning: surrounding or covering
Affix: lay
Language: en
PoS: Verb
Meaning: To install certain building materials, laying one thing on top of another.