overlay

Multiple Entries:
  overlay    overlie  

Concise Oxford English Dictionary © 2008 Oxford University Press:
overlay1

▶verb (past and past part. overlaid)

• 1 coat the surface of.

• 2 lie on top of.

• 3 (of a quality or feeling) become more prominent than (a previous one).

▶noun

• 1 a covering.

  ■ a transparent sheet over artwork or a map, giving additional detail.

• 2 Computing replacement of a block of stored instructions or data with another.

Concise Oxford English Dictionary © 2008 Oxford University Press:
overlay2

past of overlie.

Concise Oxford English Dictionary © 2008 Oxford University Press:
overlie/əʊvəˈlʌɪ/

▶verb (overlies, overlying; past overlay; past part. overlain) lie on top of.