Not identical on both sides of a central line; lacking symmetry. The artist's painting featured an asymmetric design that drew the viewer's eye in unexpected directions.
Uneven or unbalanced in terms of distribution or arrangement. The asymmetric power dynamics in the negotiation led to an unfair agreement.
(Mathematics, Logic) Of a relation: existing in one direction only and never in the reverse direction. The "less than" relation is asymmetric because if a < b, it is never true that b < a.