One who criticizes; a critic.

1

a. 1680.  Charnock, Disc. God’s Knowledge, Wks. 1684, I. 285. He is therefore called a ‘discerner’ or criticiser of the heart.

2

1731.  Blackwall, Sacr. Class., II. 265 (T.). Others … took upon them to be pert criticisers and saucy correctors of the original before them, instead of faithful and judicious transcribers.

3

1794.  Hist., in Ann. Reg., 35. Severe criticisers of the conduct of the allies.

4