Meaning

• (usually in the plural) A little schoolboy, either in grade or size.

• A class or school for young schoolboys.

• An outhouse: an outbuilding used as a lavatory.

Meaning

• Little, small, secondary in rank or importance.

• Insignificant, trifling, or inconsiderable.

  "a petty fault"

• Narrow-minded, small-minded.

• Begrudging in nature, especially over insignificant matters.

  "That corporation is only slightly pettier than they are greedy, and they are overdue to reap the consequences."