It has many definations 
1)syngamy is the sum of fertilization and triple fusion

2)This fusion of first male nuclei and theegg cell forming zygote is known as SYNGAMY
3)The fusion of a pronucleus for the purpose of fertilization, such as sperm uniting with an ovum.

syngamy: The fusion of two gametes in fertilization.
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The Brainliest Answer!
The process of union of two gametes to form a zygote..
 it involves both plasmogamy and karyogamy ..
it is also called as fertilization.
it is the most common mode of sexual  reproduction...
gametes involve-
1. sperm 

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