1. by all means - Adverb
2. by all means - Phrase
definitely or certainly
Source: WordNetBy all means let's be open-minded, but not so open-minded that our brains drop out. Richard Dawkins
By all means use some time to be alone. Edward Young
Give me by all means the shorter and nobler life, instead of one that is longer but of less account! Epictetus
By all means use sometimes to be alone. George Herbert
By all means make friends with the dog, but do not lay aside the stick. Moroccan Proverb
By all means trust in Allah, but tie your camel first. Moroccan Proverb