Definition of over-labour in US English:

over-labour

(US over-labor)

noun

rare
  • Excessive labour or toil.

verb

  • 1with object To overcome, exhaust, or harass with labour; to overwork; to overburden. Also refl. Now rare.

  • 2with object To labour excessively at, take too many pains with; to elaborate to excess.

Origin

Late 16th century (in an earlier sense). From over-labour<br>mid 16th century; earliest use found in John Palsgrave (d. 1554), teacher and scholar of languages. From over- + labour.

Pronunciation

over-labour

/ˌəʊvəˈleɪbə/