n. pl. con·form·i·ties 1. Similarity in form or character; agreement: I acted in conformity with my principles.
2. Action or behavior in correspondence with socially accepted standards, conventions, rules, or laws: conformity to university regulations.
3. Geology a. The relationship between rock or sediment strata that were deposited adjacently or vertically in sequence without any interruption due to erosion, tilting, folding, or similar natural processes.
b. A surface exhibiting such a relationship between older rock strata and younger rock strata.