What is the meaning of Lingam?

The aniconic phallic representation traditionally worshipped as a symbol of or in connection with Shiva.

The penis.

lingam

alternative form of linga

inflection of lingō:

1. first-person singular future active indicative
2. first-person singular present active subjunctive

first-person singular future active indicative

first-person singular present active subjunctive

Source: wiktionary.org