Noun galahad has 1 sense

1. Galahad, Sir Galahad - (Arthurian legend) the most virtuous knight of the Round Table; was able to see the Holy Grail
   --₁ is a kind of fictional character, fictitious character, character
   

Noun:

1. A knight of King Arthur's Round Table known for his purity and noble character.

Sample Sentence:

Legend has it that Galahad was the only knight who successfully found the Holy Grail.

Noun:

2. (Australian, informal) A foolish or gullible person.

Sample Sentence:

Don't be such a galahad and fall for his tricks.