1) Having two methods 2) Having two systems 3) Of a distribution 
a bimodal distribution is a distribution with two different modes which appear as distinct peaks. An example in fisheries is the length of fish in a fishery, which might show two or more modes or peaks reflecting fish of different ages or species.
Denoting a frequency curve characterised by two peaks. ... (05 Mar 2000) ... 
Type: Term Pronunciation: bī-mō′dăl Definitions: 1. Denoting a frequency curve characterized by two peaks.
a bimodal distribution is a distribution with two different modes which appear as distinct peaks. An example in fisheries is the length of fish in a fishery, which might show two or more modes or peaks reflecting fish of different ages or species.
[adj] - (statistics) of a distribution
AudioIn the home entertainment context, pertaining to presentations involving the visual and auditory sensory modalities.MathematicsHaving two modes.
adjective of a distribution; having or occurring with two modes
having or providing two modes, methods, systems, etc. · (of a distribution) having or occurring with two modes. Cf. unimodal. · pertaining to or suitable for transportation involving the use of two forms of carrier, as truck and rail. Cf. intermodal.