Let's 1st understand what these planets represent on their own?

Venus - Venus is Beauty, Desire and Love, Liquid Money. Venus is the main significator of marriage. Venus represents girlfriend or wife for a man. Venus is the significator of all relations, may it be husband-wife or mother-daughter. Philosophically speaking, Venus is also the cause of all the sufferings in our life. How? Because Venus represents our desires and we get pain and suffering in our life only when our desires are not fulfilled.

Rahu - It represents Illusion, Foreign Lands, Foreign Things (foreign as in unknown things. So, for someone living in Punjab, culture and rituals of Kerala is also unknown and hence Foreign), Drugs, Medicines, any type of intoxication, Fame, Wealth, Success, Obsession, Past-life incomplete Desires, Movies, Television, Online World, Cheating, Imagined Fears, Unusual Things, Unique Things, Creativity, Rule breaker. Rahu also blows things out of proportions.

House Ruler - Besides these karaka things, Venus & Rahu will also rule some houses in your chart and will represent things related to that house. Of course we can't cover conjunctions Ascendant and house wise else it will never be over. So, you have to include those things at the time of interpreting this conjunction. Also, we need to keep in mind all Yogas and Raj-Yogas which their conjunction would be making to completely understand the conjunction. Here, we can only cover meaning as per karakas. 

Meaning of Venus-Rahu Conjunction - This conjunction can have its very good effect or very bad effect. As always with Rahu, things always move in extremes, either this extreme or that extreme. So, this person can be highly beautiful and can have great attraction. They can be very wealthy. This person can be very creative with skills. They will be good at their creative skills and will spend lots of time in improving them. They can be celebrities and would love to be in limelight or in center of attraction all the time. But where this conjunction can hurt is in relationship. Venus represents Relations and Desires. Rahu is exploding those desires by being with Venus. So, this conjunction leads to a situation where a person can have unimaginable desires from relationships. As they don't find such a person to fulfill those desires, they will seek another partner and try to fulfill their desires. In one sentence, this conjunction can lead to break-ups, divorces and infidelities. These people will also be interested in foreign spouse. People from different culture will attract them more. This can easily give more than one partners in lifetime. Another thing is that Rahu is illusion and Venus is love. So, specially in early age, most of the relations they get into are very illusive, i.e. cheating is involved. They may not have correct idea about their partner. This conjunction also leads to a situation where person can dream about a relation from virtually nowhere. Like, they are sitting at a place and met someone whom they liked and within next 30 mins they will actually dream themselves getting married to that person and having a family. Actually, 30 mins is a long time I guess, lol. In some cases, it can lead to a situation where person can have high sexual desires. 

Who will win the Conjunction? - Rahu will. Venus is too feeble to control Rahu. 

Dignity & Strength - 

This conjunction will work as per the dignity of Venus as Rahu will explode those traits of Venus only. But in no case it is going to be beneficial for relations. If Venus is well placed like in Taurus, Gemini, Libra, Sagittarius, Capricorn, Aquarius & Pisces, then Rahu will explode person's wealth, beauty and creativity. Relationship will still suffer. 

In Leo, although Venus is in enemy sign but as Leo is sign of Creativity, creativity factor will still prosper and person can have good chance to become celebrity. At least they will treat themselves as celebrities, lol. 

In Cancer, person will get into useless emotional love stories which may be very much illusive and person may get cheated there, at least in early life. 

In Virgo & Scorpio, this conjunction can be really troublesome as this can lead to sex addiction, sexual abuse or prostitution in some cases.