Obs. or dial. [A prep.1 in + PART: cf. the earlier A-PARTY.] In part, partly.
1481. Caxton, Reynard (Arb.), 25. That causeth me a parte to be hevy in my herte.
1548. Geste, Priuee Masse, 133. Which matere is … not a parte only but throughlie faultie.
