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Webster 1913 Edition

Adj.

Showing good manners; civil; respectful; complaisant.

What thou thinkest meet, and is most

mannerly

Shakespeare

adv.

With good manners.

Shak.

Adj.

Decent in external deportment; civil; respectful; complaisant; not rude or vulgar.

What thou think'st meet and is most mannerly.

adv.

With civility; respectfully; without rudeness.

mannerly ‎(comparative more mannerly, superlative most mannerly)

polite, having good manners
- 1593, William Shakespeare, Two Gentlemen of Verona
  Lucetta, as thou lov'st me, let me have / What thou think'st meet, and is most mannerly.
- 1861, Charlotte Yonge, The Young Step-Mother
  ...but Genevieve's laugh roused her again, partly because she thought it less mannerly than accorded with the girl's usual politeness.