The multiple-query nearest-neighbor (MQNN) problem is stated as follows: given a set S of n points in plane and a set Q of m(1≤m≤n) query points, determine for every point in Q its closest neighbor in S. Besides the pure theoretical interest, this problem has many practical applications in various areas such as: computer graphics, pattern recognition and image processing. First, this paper proposes a new time-optimal algorithm to solve the all nearest-neighbor (ANN) problem in [Formula: see text] time on a mesh-connected computer of size [Formula: see text]. Next, using this result in conjunction with the generalized multiple search (GMS) paradigm of Bokka et al.3,5 we devise a time-optimal algorithm that solves the MQNN problem in [Formula: see text] time on a mesh with multiple broadcasting (MMB) of size [Formula: see text].